Just got done "trying" to cast some 45/70 boolits.....my lee mold has done excellent so far but today the boolits were all wrinkly like my alloy was too cold or something.....I'm guessing I need to clean the cavity (thinking it might be contaminated with lube or something)....I usually clean the cavity with rubbing alcohol and a q-tip....is there a better way to clean it? Would gasoline or paint thinner do a better job? I was thinking next time I will scrub it with an old toothbrush.....Thanks for the help!!