you didnt get any answer because nobody can beleive your this much of an idiot
Use a razor blade to scrape it off. Usually once the polyurethane has cured nothinng will dissolve it. So, a razor blade will be your best bet.
The simplest way would be a razor blade. Just scrape it off. Assuming these are glass mirrors and not plastic.
Carefully scrape with a razor blade
Glass window use a single edge razor blade.
Scrape it carefully with a razor blade
razor blade works well
Scrape it off with a razor blade, then get any residue with Goo-Gone.
No, remove the old stuff, scrape it off with razor blade or similar then reapply
Scrape off what u can with a razor blade. White vinegar should remove what's left.
Scrape the glass with a single-edge razor blade. Use vinegar to remove the lime-scale and Windex or other glass cleaner to finish it off. Rinse it well and fill it to test it for leaks outside. If it is old, the joints may be leaking.
razor blade razor blade razor blade bumhole seal
Spray some Windex on it and scrape with a single edged razor or scraper tool. Works perfectly.