My buddy has an achilles rib and he needs to get the numbers off teh side to register it in a new state. As the old rubber decals are peeled back it seems to be taking some of the orange from teh tube with it. We use a hair drier and it didn't seem to ease things much. Does it matter that it is peeling some of teh tube off that much? Is there some kind of chemical we can safely use on the tube to remove the letters?