The end of the wrap or the "terminator" with the foil at the base in the strip next to the outer jacket is commonly hard to see and to locate. If you will find this "terminator," you may nick it with a small Reduce with a knife and peel it https://docs.google.com/spreadsheets/d/1ob0dJEGF99z3qEFgx4NgE8G5OsXOxoJg98eF010UfgA/edit?usp=sharing