Originally Posted by
prathmann
Most of the patches that I've used have a thin slit in that plastic. Gently stretching the tube and patch breaks that slit open and facilitates removal of the plastic from the patch.
Fold the patch in half (it also makes you pinch the tube in place...a good thing). Plastic should split in the middle. Peel the plastic from the middle towards the outside of the patch. If you peel the plastic from the outer edge, you can lift the patch if it hasn't set completely.
Or leave it on. It doesn't hurt anything.