Thanks Jen...problem is, I don't know what "feels right" or "clumps just right"...

I did the mixture and it seemed to be clumping just a bit. I added 6 ounces of water to 6 ounces of Perlite... 1:1.

My question now is about condensation. I don't see any and none has built up on the shoe box cover or sides. It's been in the incubator for a few hours now. Should I see condensation?