If it is on a pre-made bat, follow this. Get a wet towel and put in over your bat. Using a hot iron, iron the towel which is over your bat. Now the rubber with sponge will come off rather easily. Do it for both sides. I did it by first removing the topsheet and then applying this method to sponge only.
Sent from my Redmi Note 3 using Tapatalk
That's nice to hear. Hopefully, it will b a smooth sailing for you.