Tried just snapping once. Whole thing broke in half and lost most of it. Started using a triangle file to score around the edge, works great. Just a few scratches around and whammo opens easily. No worries. Used a marker cap, worked pretty good but second time tried started to worry about putting too much pressure on. I like scoring, takes 20 seconds tops, and makes it idiot proof. Plus I hate spilling sauce, it is hard to suck up with a needle out of the carpet. Plus the carpet fibers really burn going in.