We're using Oomoo 30, Alumilite Clear, Vaseline, and just CRC General Purpose Silicone Mold release. Biggest problem is the stem. Will not come out no matter what. Need to rip off the cap from the top and poke the resin through to finally be able to rip out the cap with tools. Thing does not come off, no amount of Vaseline and mold release is doing it.