Report Trimming Dilemma in Studio Operations and Making Work Posted March 29 · Edited March 29 by Stephen I would slice some in half to see what is going on and when. Before coming off the bat, right off the bat, before trimming and after. I'm with Mark on the foam trimming bat being the culprit but maybe its just the angle of the picture. Seems like everyone covered lots of possibilities though so if you can narrow it down for certain when it is happening one of the causes might come into focus. Good luck! edit: I only use foam bats for things that are really only getting a little light clean up like cups and mugs. Anything that needs a foot trimmed in happens on hard bat.