What use have you been drying your coffee grounds for? @humblehillsfarm has been using hers for scoop litter method (made that term up), where I've been just tossing wet grounds into my run/coop and letting the chicks toss them around and dry in the heat.
Just to be able to get them off of the filter. I fill up an empty coffee can with them, and then dump them all over the yard. I do't free-range my chicken's though.