If you have a vinyl sticker decal you have placed on a glass window or door, you may need to re-stick it to the surface at some point. Over time, the moisture that helps the vinyl sticker adhere to things dries out, causing the sticker to begin bubbling or peeling. Carefully remove the vinyl sticker, and reapply it to the glass surface using a little cooking oil or baby oil.
Things You'll Need
Carefully peel off the vinyl sticker from the glass surface. Since it's already losing its adhesiveness, it should come off easily.
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Clean the glass with glass cleaner and a lint-free cloth.
Spray water on the surface, and wipe it down with another lint-free cloth.
Pour a little cooking oil or baby oil on a third lint-free cloth.
Spread the oil across the surface of the window, in the spot where you'll reapply the sticker. The oil should coat the glass but not be dripping.
Press the vinyl sticker back onto the surface of the window, making sure to smooth out any bumps or wrinkles.