Left my cookie on for a bit too long. Sometimes I don’t use bat pins and a bat with holes in it. I just go old school and throw a flat cookie, like a plate and then make rings and an x through it to help suction larger bats on my wheel. I used to use y fist to then punch down in the centre to secure it but years ago I changed that habit and now use a rubber mallet. It doesn’t take a lot to secure a bat, old habits are hard to break though