Plexiglas, an acrylic product, is often used for storm windows, tabletops and other home surfaces because it's lighter than glass. As with other materials, dust and other pollutants will collect on the surface. Softer than traditional glass, Plexiglas scratches easily -- a factor you must consider when you clean. Avoid using glass cleaners, as many contain ammonia, which may damage acrylic.
Pour 1 tablespoon of liquid dish-washing detergent into a clean bucket. Add 1 to 2 gallons of warm water to the bucket (you can make more or less of this detergent and water solution, depending on how large of an area you need to clean).
Wet a soft cloth or soft towel in the solution and wipe it over the Plexiglas. When the cloth becomes soiled, change to a different cloth or turn it over and use the other side. Dirt particles on the cloth may scratch the acrylic. Always thoroughly wet the cloth first with the cleaning solution. Using dry cloths or other dry materials presses dirt into the surface, making it harder to clean and potentially causing scratches.
Soak a soft sponge (never use abrasive sponges) in the solution, and rub it over remaining soiled areas. A soft sponge is a bit more abrasive than a cloth or towel and should help remove stubborn, caked-on dirt. Rinse debris from the sponge often.
Rinse out your bucket, ridding it of soap residue, and add clean water. Use a fresh towel or cloth soaked in the clean water to rinse the Plexiglas. Dry Plexiglas with a soft, lint-free towel.