Glue or adhesive can remain on a mirror when a sticker, decal or tape has been removed. Depending on the type of glue or adhesive that was used there are various ways to remove it. Glue can be removed using a scraper, solvent or another piece of tape. You can remove glue from a mirror by first making sure you have the proper materials and supplies to complete the project.
Remove loose pieces of glue or adhesive using a piece of duct tape. Cut off a 6-inch piece of duct tape form the roll and tape it together to from a circle. Place the duct tape over the glue or adhesive on the mirror and pull it off. Do this repeatedly to remove all of the loose glue or adhesive on the mirror. If this doesn't work, try another method.
Mix a solvent of rubbing alcohol and dish soap in a spray bottle. Add 2 or 3 tablespoons of rubbing alcohol, a couple drops of dish soap and then fill the spray bottle with water.
Spray the solvent on the mirror in small amounts and let it begin to neutralize the glue or adhesive.
Remove the glue with a razor blade after waiting two or three minutes. Hold the razor at a 45-degree angle and push up or away from you when scraping. If the glue is not coming off easily apply more of the solvent, let it set, and try scraping again.
Clean the mirror using window cleaner and a paper towel to complete the project.
Multiple applications may be needed to completely remove all of the adhesive on a mirror.
Don't scrape too hard as it can scratch or mar the mirror.