Most window decals can be easily removed and will not leave any glue or other residue behind. These include temporary vinyl window graphics and static cling window decals. While it does depend on what type of decal you’ve used, most window decals are easy to remove and won’t leave any residue behind. Specifically, static cling window decals don’t require tape or any other adhesive, so when you want to remove them, you can simply peel them off.