Squirt it on a pc of cardboard first. then smear it asap with a tooth pick. It cools fast when it hits the cardboard then the tooth pick, gotta be quick. Helps too is the gun wasn't plugged in very long and is not at it's hottest level. I only did it twice and at a late stage of development. When I hand turn, sometimes I move them to fast and have been known to clack them by accident. Thus a micro crack found during the candle here and there.I have a mini hot glue gun, but thought that would be too hot.