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Cleaning Grinder Between Blends

Grinders are one of the keys to exceptional espresso. Discuss them here.

Link to "Cleaning Grinder Between Blends"by lonewolfbefree on Thu Jan 03, 2008 12:54 pm

I was wondering, how do you clean your grinders between coffees? I rarely buy the same coffee back to back, and the following is the cleaning regiment that I do between those coffees. I currently have a Virtuoso grinder (as of next week I will have a Mazzer mini too ':lol:' )
Here is what I do:

i. After finishing a coffee (from this point on coffee means coffee or espresso blend) I clean all of the plastic pieces (hopper, hopper lid, plastic collector where the ground coffee exits the grinder) with soap and water and set aside to AIR DRY.

ii. I Take out the top burr and using a wire brush clean off the excess coffee from the burr.

iii. Using the same wire brush, clean off coffee from the bottom burrs.

iv. Vacuum the extra coffee out of the burr area, and replace top burr.

v. If plastic parts are not dry, use a paper towel to dry them.

vi. Replace the plastic parts

vii. Run a little of the new coffee through the grinder, and throw away.

viii. Grind away.

About once a month I hit the plastic surfaces that are in contact with the coffee with a little vinegar. After I have rinsed the pieces with water, I pour some vinegar onto a paper towel and wipe them down. I then rinse the pieces for a few minutes and let them air dry.

I have read somewhere (sorry, don't remember where) about running some white rice through the grinder to absorb the coffee oil from the burr set. Has anyone else heard of this? Do you guys do anything different?

And yes, I know about Grindz.
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Link to "Cleaning Grinder Between Blends"by narc on Thu Jan 03, 2008 1:59 pm

For routine cleaning, the tear apart.
After reading & viewing the photos posted about Grindz, I'm going to place an order for the stuff for routine cleaning. The fine threads on the Mazzer require attention when reassembling. Would like to minimize the tear aparts.
I would avoid rice due to the potential of leaving a residue of starch on the burrs.
Normally between changing SO or blends I just sacrifice a few grams of beans to clean out the grinds left after brushing out the chute & doser. Same as I do when adjusting grind to hit the sweet spot.
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Link to "Cleaning Grinder Between Blends"by RegulatorJohnson on Thu Jan 03, 2008 2:34 pm

grindz are kind of nasty for me.

i still do a tear down because the grinds do clean the burrs but the grinded grindz just pack in on top of the packed in coffee.. then they release white bits into your coffee that you brew with...

mmmm brewing with alcohol soaked coffee bean shaped pill base. they say its safe ,, but i still know i dont want it in my cup.

i would recommend still tearing it down and scraping out the grindz and the coffee.

ymmv.

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Link to "Cleaning Grinder Between Blends"by cannonfodder on Thu Jan 03, 2008 6:40 pm

I brush out the grinder chute, burr throat, add my new beans and give it a 2-3 second pulse and dump the grounds. Then start using my new blend. I only tear the machine down for a thorough cleaning about once a year.
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Link to "Cleaning Grinder Between Blends"by Marshall on Thu Jan 03, 2008 9:06 pm

lonewolfbefree wrote:I was wondering, how do you clean your grinders between coffees? I rarely buy the same coffee back to back, and the following is the cleaning regiment that I do between those coffees. I currently have a Virtuoso grinder (as of next week I will have a Mazzer mini too ':lol:' )
Here is what I do: [description of severe OCD symptoms deleted]

I might do that, if I switched blends after every ounce. But, given that I run through a pound before switching, it would be silly. If you run the grinder until nothing else comes out of the chute, then brush out what is left near the lip, there will be so little left of the old blend, that you are very unlikely to notice it in the first shot or two of the new blend. And you will need scientific instruments to detect the traces of the old blend left after that.

Making and drinking espresso is supposed to be enjoyable, not a time to imitate laboratory conditions.
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Link to "Cleaning Grinder Between Blends"by HB on Thu Jan 03, 2008 9:28 pm

While not scientific, leaning over the grinder and sniffing will tell you if it's time to clean. Most of the coffees I use are light to medium roasted and very fresh, so they don't leave an oily mess in the hopper. I remove the burrs and clean out the grinding chamber a few times a year. While I have no proof of it, I think the grinder's "beater bars" do a better job of aerating the grounds after a good cleaning, which makes for easier to distribute grounds.
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Link to "Cleaning Grinder Between Blends"by Nick on Thu Jan 03, 2008 11:32 pm

Vacuum... or air-can. Does the trick real quick.

If you have grinds caked-on, that's a different story, but the air-can still works fairly well.
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Link to "Cleaning Grinder Between Blends"by lonewolfbefree on Fri Jan 04, 2008 11:34 am

Ok, so it looks like I am doing a little cleaning overload. OCD, yeah, I will take that. I guess it comes from the fact that I do work in a lab and I am a Chem major (':oops:') Thanks for the feedback.
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Link to "Cleaning Grinder Between Blends"by Marshall on Fri Jan 04, 2008 11:50 am

lonewolfbefree wrote:Ok, so it looks like I am doing a little cleaning overload. OCD, yeah, I will take that. I guess it comes from the fact that I do work in a lab and I am a Chem major (':oops:') Thanks for the feedback.

My wife is a chemist. My oldest friend is a molecular biologist. I recognize the symptoms.
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Link to "Cleaning Grinder Between Blends"by jesawdy on Fri Jan 04, 2008 12:48 pm

lonewolfbefree wrote:Ok, so it looks like I am doing a little cleaning overload. OCD, yeah, I will take that. I guess it comes from the fact that I do work in a lab and I am a Chem major (':oops:') Thanks for the feedback.

Hey, if it makes you happy who cares?

I take the simple road myself. I attempt to remove and clean the burrs quarterly, but probably slightly less frequent than that. I do not use Grindz nor rice, although I have tried rice to clean up some used grinders. I took it apart after using the rice, cleaned it up and then ran some coffee through it.

Between different coffees, I just run the grinder empty, check for hung up beans above the burrs and drop the new coffee in.
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Link to "Cleaning Grinder Between Blends"by Marshall on Fri Jan 04, 2008 12:53 pm

jesawdy wrote:Hey, if it makes you happy who cares?

Because newbies and other lurkers take the stuff they read here very seriously. What an experienced reader understands to be "a debatable proposition" may look like the minimum standard to them.
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Link to "Cleaning Grinder Between Blends"by jesawdy on Fri Jan 04, 2008 12:58 pm

Marshall wrote:Because newbies and other lurkers take the stuff they read here very seriously. What an experienced reader understands to be "a debatable proposition" may look like the minimum standard to them.

Agreed.... it is hard to know what is and is not important as a newbie. I was just saying to the OP that if he needs to satisfy his OCD compulsions, he should continue to do so.
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Link to "Cleaning Grinder Between Blends"by Marshall on Fri Jan 04, 2008 1:16 pm

jesawdy wrote:Agreed.... it is hard to know what is and is not important as a newbie. I was just saying to the OP that if he needs to satisfy his OCD compulsions, he should continue to do so.

I understand. Posting here on a regular basis is certainly in the Top 10 OCD Warning List.
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Link to "Cleaning Grinder Between Blends"by Psyd on Fri Jan 04, 2008 1:26 pm

lonewolfbefree wrote:Ok, so it looks like I am doing a little cleaning overload. OCD, yeah, I will take that. I guess it comes from the fact that I do work in a lab and I am a Chem major (':oops:') Thanks for the feedback.


I do the same thing that you do to clean the grinder, but only when it begins to smell like old or rancid coffee. As long as a whiff of the doser or hopper is still pleasant, I'd let it go.
I do sweep it fairly clean with two or three clearing bursts and a brush after every set of shots, and I change beans fairly frequently. I haven't noticed a lot of crossover. One of my fave things, though, is to take the last of any blend and/or SO and fill the last shot with whatever I'm switching to, just to see what the two taste like together in the same cup. Most have been odd or boring, but there have been a few winners.
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Link to "Cleaning Grinder Between Blends"by cannonfodder on Fri Jan 04, 2008 2:21 pm

As I stated earlier, I only take the burrs out once, maybe twice a year for a very detailed cleaning. I have taken the grinder to the garage and hit it with the air compressor before to blow out some of the more stubborn grounds that get caked around the burrs. Just do it outside the garage and do not look down the doser or grinder throat when you do it. I made that mistake once. Sand sized coffee particulate applied to the eyes behind a 90psi blast of air can sting, and turn a white shirt brown. :oops:

I do not have a set schedule, it is more a matter of when the grinder tells me it needs cleaned, look, smell and taste. If I get an oily bean I will wipe out the hopper with a damp, slightly soapy towel and hit it with the compressor, but I am not a fan of oily dark beans so that is very few and far between.
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Link to "Cleaning Grinder Between Blends"by lonewolfbefree on Fri Jan 04, 2008 3:00 pm

I am not a fan of oily beans either.

I have found that my best guide to espresso is taste, and I let taste be the minimum standard that I judge by. I am glad to find that I can spend less time cleaning my grinder(s), and that shot taste should not be affected. I make a big enough mess, according to my wife, as she is graciously rearranging the kitchen for my new equipment that arrives on Wed.

I can now apply my OCD to something more productive, like...HB posts. (':lol:')
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Link to "Cleaning Grinder Between Blends"by rferoni on Mon Apr 14, 2008 2:24 pm

Firstly, I am a noob so take it for what its worth.....

Anyone here have older mazzer major? I have an older major(15-20 years old I think)that is pretty easy to keep clean except for two areas. The inner edge of the lower burr likes to collect a nice ring of compacted coffee and the area between the upper burr and the adjustment dial it's connected to likes to really collect some coffee. Never wieghed the amount but I'd say it's around 4-5gms.

I don't worry about it too much as I think once it gets in there its pretty compacted and won't let any more coffee in. When I do get the urge though I do clean it. Easiest way I've found without taking off the burrs is using and awl(or heavy duty paper clip bent straight) and an unused allen wrench. The awl/paperclip is good for getting the lower burr coffee out, and the allen wrench is good for getting out the coffee stuffed between upper burr and adjustment dial. The 90* bend on the allen wrench proves very effective for this.

Vaccuum said loose grounds as you go and voila, clean grinder. I follow suit like most and just toss a few grams on a new blend. Vaccuuming the chute/burr area keeps my mazzer petty darn clean..

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