Boiled or just hot water is fine. Dip in the piece; wait until it reshapes; take it out and make sure it's how you want it, then leave it or put it in cold water so it stays that way.
Boiled or just hot water is fine. Dip in the piece; wait until it reshapes; take it out and make sure it's how you want it, then leave it or put it in cold water so it stays that way.