Practical advice please. I bought my car 3 years ago, the first job was to apply the standard SUFC tax disc size stickers back and front screens. Over the years the stickers have faded and are now a bit dull (as am I), I bought some new stickers, the old ones appear to have welded themselves to the car glass. I’ve tried a wood chisel to use as a scraper, not very successful. Anyone, please, how do I remove these old stickers? Thanks.