Pull back. As your heat gun gets hotter, pull back to create more distance. I use a pin to create a couple of holes in each "pouch".I finally got all the soap shrink-wrapped. I have decided I have a love hate relationship with shrink-wrapping. I have been trying to figure out if the heat gun needs to cool down every once in a while. I can be moving along-everything going good--and then bammo. I start getting holes grrrrrrrrrrrrrrrr the bags I just got don't seem to have an air hole in them so I was clipping a corner off. would it work if I just put a pin through a bunch at one time?