I actually did it a little different. I let them dry in the very small # screen square that came with my bubble bags for a day. It will still have a TON of moisture.
Then I shaped them into balls, and wrapped them in wax paper. Then I put them on top of my pellet stove (which gets too hot to touch) and flattened the balls out with a 45lb kettle bell.
Once they were flat, I left it like that for 12 hours. Flipped it. Put the weight back on. Over and over for a few days.
They will still hold a ton of moisture. Some guys use an iron instead. If you arent careful they can actually get mold on the outside.