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Square Mile’s has changed a bit recently but always solid.
I think the wet puck might be due to the decaf process getting rid of all chaff, like a natural, which always seem to leave a really sticky puck.
Have you tried to dial out the bitterness? If you’re used to using a normal coffee, a decaf would probably need very different parameters. So the usuals for getting away from bitterness; coarser grind, shorter time, lower temp even.
Who roasts a good decaf bean for espresso?
In use YellowBourbon at the moment, and the puck gets really soggy when I pull a shot, and they end up bitter.