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Use a glass measuring cup that is large enough to hold the vinegar and not spill over if you were to dip a rag into it. Use a glass container rather than plastic, since you will need to heat up the vinegar. One of the great things about removing paint from glass is that you probably already have everything you need at home. You don’t need to use any chemical-based products—just white vinegar and dish soap should do the trick! There’s no need to cover the bowl, but do keep an eye on it as it heats up so you can stop the microwave once the vinegar starts to bubble. Depending on how strong your microwave is, this might take a little more or less time than indicated. The rubber gloves will keep your hands from getting burnt in the hot vinegar. A smaller rag, about the size of a washcloth, works well for this project. A hand towel could be too bulky and get in the way while you’re working. You could also use a clean sponge for this step, too. Use some elbow grease to really rub the paint and saturate it with the white vinegar. This should soften the paint, and it may actually completely remove it! If it doesn’t come off yet, that’s totally okay. Just move on to the next step. If the paint does come away completely from using the white vinegar, simply spray the window with glass cleaner and wipe it down to clean it off. Put the dish soap into the bucket first so it can get sudsy while the bucket is filling with water. Try your best to do this right after the vinegar step so that the paint doesn’t have a chance to dry again. Really saturate the paint with the soapy water. If you’re concerned about the water running down the wall or hitting the floor, lay down a towel underneath of where you’re working. Use firm pressure, and only scrape in one direction. Remoisten the paint from time to time with the soapy rag to keep it lubricated. Try to get the edge of the razor underneath the entire section of paint so that it comes away in one piece. Take your time with this part of the process. You want to avoid scratching the glass, which can happen if you rub back and forth or scrape too quickly. This should get rid off all the vinegar, soap, and remaining paint flakes. Wipe the cleaner away with a clean rag or with paper towels. If you notice you missed a section of paint after you clean the window, go back and repeat the soapy water and scraping steps until it comes clean.

Summary:
Measure 1 cup (240 mL) of white vinegar into a glass measuring cup. Microwave the white vinegar for 30 to 60 seconds until it comes to a boil. Put on rubber gloves and dip a clean rag into the white vinegar. Scrub the paint with the vinegar-soaked rag. Fill a bucket with warm water and 1 tablespoon (15 mL) of dish soap. Soak a sponge or rag in the soapy water and wipe down the paint spots. Run a razor blade over the paint very slowly at a 45-degree angle. Use glass cleaner and a clean rag to wipe down the window.