If those tattered old bumper stickers on your car make you feel more nauseated than nostalgic, it’s time to break out the vinegar. Saturate the top and sides of the sticker with undiluted distilled vinegar and wait 10-15 minutes for the vinegar to soak through. Then use an expired credit card (or one of those promotional plastic cards that come in the mail) to scrape it off. Use more full-strength vinegar to get rid of any remaining gluey residue. Use the same technique to detach those cute decals your kids used to decorate the back windshield.