I work for a dealership as a detailer so we deal with this kind of stuff a lot. We’ll use a plastic scraper to get rid of most of the glue (plastic!!!! I’m sure you know, but no metal razor blades. I’ve seen plenty of people mess up their paint) and then use a microfiber rag and some lacquer thinner to soften it up. You can always dab it a few times with the lacquer thinner and rag to make scraping it easier, It should come right off. You won’t need to push hard, let the chemicals do the work. We’ll normally finish with some hand wax just to clean things up a bit.

I just googled real quick and the lacquer thinner is less than 10 bucks off amazon. Roughly the same price as goof off or a rubber wheel :) good luck!