[Stripit]

I used a windshield installation tool, it is about 8 inches long and maybe 1 inch wide at the widest and is a type of plastic that is tough and durable. Has 2 different ends, one was rounded and pretty sharp, not like a knife but sharp edged, the other rounded and more blunted. You can use some good force with it and not be afraid of it snapping or breaking. Cost about $4.00 and I've used it for years and normally any autobody supply house will carry them. Maybe if you stopped at a windshield replacement business and asked nice they may give you one of the used ones they have. Works GREAT for removing cauling and sealants.