I had the same problem. The guys from here told me not to "smoke" my molds with wood matches as they may have some wax in them that gets into the mold. Also, they advised me to boil my molds with a mild detergent for 15 minutes which I did and WOW what a difference. My bullets fill out better and they don't stick to the mold near as bad as they used to. Might be worth a try. It worked for me. My .02