We used to boil our base molds in soapy water. We then rinsed them in warm
water. We also used to place them in a solution that was mixed with 95% alc
so the blocks wouldn't stick to the molds. However, I can not remember the
name of the solution we used or were we bought it..

Mari Ann Mailhiot BA HT
Application Specialst
Technical Assistance Center
Leica Microsystems
800 248 0123