Types Of Photo Paper How Do You Get Blu-Tack / Prestik / Putty Off The Glossy Side Of Photo Paper?

How do you get Blu-Tack / Prestik / Putty off the glossy side of photo paper? - types of photo paper

Do not ask me how he got there, but I can not be removed. Is there a way to save the track to? I've tried a ball, using it, but makes it worse. The sheet is empty, save a picture, but this type of paper is expensive, and I saved.