I fill a sink with hot water, add the molds, then rinse and wipe the water out with cotton balls, then polish with 90% alcohol. Never use soap. I have to wipe out the molds right away because the water in my space has a fair amount of calcium in it.
I do agree that it’s funny how we all have different techniques to clean molds!
As for cocoa butter, I have a dehydrator that I warm my cocoa butter and keep my gun in, and have it set at 95F. When I get ready to airbrush I take the cocoa butter out and shake it a few times then use it in the gun. Rarely do I have issues with sticking. As for handpainting, I’ve become a lot more diligent at checking temps before using and making sure it’s below 90F, and have had much better success.