I just converted my bg with the kam snaps pliers. I had some similar issues because of the way you have to sandwich the fabric instead of the snap touching the plier directly (I hope that makes sense), and the extra thickness and seam just where you want to put the snaps makes it go a little crooked and therefore the tip doesn't get totally squished. It took some practice to position the snaps just right, and I'd give it a press from two directions to even it out to get the best squeeze, and if I had plastic poking over so it interfered with snapping I trimmed it off with my sharp, small garden clippers and the re-pressed to make it good and flat. It was a bit hard on the hands after doing 20 of them, but I did get them all done and all the snaps work. It was harder than I'd expected. FWIW, when using the pliers for other applications without having the fabric sandwich , it works great.