M.G.
L.,
First of all, please do NOT take Kim S.'s advice. Swatting her child every time he tried taking the tape off?? Hitting doesn't solve anything. It only teaches the child to hit. That is just awful.
What I just started doing with my 4 year old son is threatening to put some mustard on his nails. He doesn't like mustard. The second he saw me walk toward the refridgerator, he took his hand out of his mouth. Good luck!