What I did last time was I let the coffee beans off gas for about a week after roasting them to a medium roast, I then filled the extract up to the top of the beans and let them soak for a little over an hour. Drained them and spread them out on parchment paper on a cookie sheet in a single layer spread out. I then turned the oven on to the lowest setting (170 F on my oven) and put them in the oven for 10-20 minutes just to dry them out… if I didn’t have so many pets I probably would have just let them air dry, but didn’t feel like cat hair flavored coffee and also didn’t want to wait a day for them to dry out. After the cool off you should just be able to scrape them off the parchment paper, then just grind and brew.