A safe cleaner to use to clean mildew off of beach chairs. To get mildew and mold off of beach chairs is a pretty easy, unless they are really bad off, but give it a shot. Take some white vinegar and put it on a rag and wipe the chair thoroughly getting every nook and cranny. Wipe clean, and apply again if needed.(Apply in a test spot first) Vinegar is the best way to clean and deodorize without using harsh chemicals.