If those tattered old bumper stickers on your car now make you feel more nauseated than nostalgic, we suggest you consider breaking out the vinegar. Saturate the top and sides of the sticker with undiluted, distilled vinegar and wait about 15 minutes for the vinegar to soak through the sticker. Then use an expired credit card (or one of those promotional plastic cards that come in the mail) to scrape the old bumper sticker off. Then use more vinegar to get rid of any remaining glue and residue. And you can use the same technique to detach those cute decals your youngster used to decorate the back windshield.