I have a potential new client. She said, "if you can get that glue of that window, you can come back each month." This is a doctors office, would be a really good client; word of mouth wise. She said she has tried everything herself to remove this glue. It is the adhesive from a Velcro sticky that she had attached a poster to. Looks like the sun has baked it good. Any suggestions on what I may be able to use. She said she has used every over the counter home-depot product and a razor blade and nothing works. Sure would be nice to just go in, wipe it off, and get that account.