A few years ago, back in my teenage days, I thought it was cool to have a blue vinyl over my headlights. After a while, I got tired of them and realized how stupid and unsafe they were to have on. However, when I took them off, there was so much leftover adhesive and I couldn't get it off no matter how hard I tried and no matter what I used. Still today, that adhesive is still there and still won't come off no matter what I use. I've tried alcohol, gasoline, goo gone, a heat gun with a razor, and still nothing! Does anyone have any idea what I can do to get this stuff off once and for all?