A lot of coffee rests in the grinder, even if you do sweep / chopstick it after a shot.
Next day, before you load beans, run the grinder. How much stale coffee exits?

On 3 grinders of various types, on the next day, I usually get 1-3g, regardless of how fastidiously the grinder is swept after use.

I'd be willing to concede an insistence on fresh coffee diminishes the value of diving of tea leaves, er I mean, entrails, er I mean, pucks. Whew! Pseudo-science always gives me flutter-fingers

cafeIKE wrote:A lot of coffee rests in the grinder, even if you do sweep / chopstick it after a shot.
Next day, before you load beans, run the grinder. How much stale coffee exits?

Zero. Zilch. Nix. Nada. None. As I suggested in an earlier post. If it exits the next morning, it'll exit the day before.
Granted, when I'm at the GF's house, and all I have there are two Rockys, I have to tip them and smack them to get them to cough up that last gram of coffee. I could just sacrifice two or three grams every shot, except that I don't want to. The Majors come clean. Yeah, there are some twists and turns I have to go through with them, as well, but parking at my local coffee shop is a pain. I'd rather clean the grinders and go once a week, than sacrifice ten shots a week and go twice a week.

cafeIKE wrote:Pseudo-science always gives me flutter-fingers

Why is it that anything that some folk don't understand has to be bunk? It's a simple scientific test.
"Is it better when I do this?"
A. Yes. Keep doing it
B. No, it's the same. Do it if it makes you happy
C. No, it's worse. Stop doing it.

Sometimes, some people with some kit in some areas at some times of days with some coffees are going to have different answers than yours. That certainly doesn't mean that you are wrong, nor does it mean that you are right.
But if you absolutely have to be right, I guess I could concede that there is nothing to be learned, ever, from looking at a spent puck.

Psyd wrote:But if you absolutely have to be right, I guess I could concede that there is nothing to be learned, ever, from looking at a spent puck.

Knowing when to concede a point simply to end an argument that is not worth winning is a social skill I did not grasp for many, many years. Some never learn this valuable life-lesson. Clearly you are a man wise beyond your years.

Dan, you obviously just don't understand just how old and tired I am ...