Ross Droplet Technique-Eliminating Grinder Static

Grinders are one of the keys to exceptional espresso. Discuss them here.
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#1: Post by yakster »

I attempted to reply to an old thread, Reducing Grinder Static, but it's been locked due to age so I'm starting a new thread to break out a nugget posted on the The New HG One Grinder: The Home Test thread, that adding one or two droplets of water to the beans before grinding resolves the static issue.

This tidbit was dug up by Andy Schecter and credited to David Ross from a 2005 Alt.Coffee post.

I haven't tried this trick yet, but it's much cheaper and easier than buying a Zerostat gun.

I'm breaking this out on it's own thread because I imagine that not everyone is following the HG-One grinder thread or the other hand grinder thread this was mentioned on.

Update: Thread title has been changed to reflect the new name for this procedure, the Ross Droplet Technique (RDT).

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#2: Post by »

Great idea Chris!

I just tried adding droplets of water to my beans and I was thoroughly amazed.

Compak k10 single-dosing - less grind seemed stuck in the grind path and chamber. I'll have to quantify it, but I know that my second dose without the water was more tedious. We'll see...

B-Vario - Chaff and fines are almost always sticking to the sidewalls of the dosing container. This time? Zero...
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#3: Post by TomC »

Smart move. Works a treat.

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#4: Post by jbviau »

I'll definitely try this, but is there no downside? Guess I'm just conditioned to assume water and grinder insides don't mix well...
"It's not anecdotal evidence, it's artisanal data." -Matt Yglesias


#5: Post by bmb »

That's a legend ...
For a bad bean, that pestered my grinder, I had to wash my burrs with water and light soap; take care to dry very well with a towel and hair drier, to avoid rust.
One or two drops of water in 14 - 20gr of beans should only raise the humidity rate a few percentage points.

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#6: Post by »

The drop or two of water is such a negligible amount of water that it won't be similar to dousing your burrs in water. Literally, the smallest drop of water made all the difference for me.

The water essentially neutralizes the static electricity buildup, right?
Wet balloons will not stick to your hair no matter how much you rub. :lol:
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#7: Post by dumpshot »

Voodoo Modded Pharos with 15g Redline Decaf from Metropolis before the water droplet trick:

After putting literally two or three drops on 15g:

All I can say is, "It is a Christmas Miracle!"

Thanks TomC via Andy Schecter via David Ross. That little trick just improved my whole coffee groove.

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#8: Post by »

That's the money shot right there :mrgreen: This should be a thread of money shots.
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#9: Post by TomC »

It shall henceforth be called the ROSS DROPLET TECHNIQUE- shortened, RDT. :lol:

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#10: Post by TomC »

And to simplify it even further, and speed it up to the point where it literally adds no time...

As long as your hands are clean (who would prepare food if they weren't?), dip your finger tip into water and flick the dose of beans. It will be enough water to do the job perfectly.