Hi Kelly!   We clean our molds in the processor, on the "Clean" cycle, let 
them air dry and use them again the next morning. Maybe the soap and/or water 
is causing the problem.  If you really want to coat them with something, 
glycerin or mineral oil dipped with gauze and wiped over the molds should do 
the trick. (It's an old method!)

Good Luck!!
Jeanne Godine]
Pathology Consultants