Wash plexiglas with a mild soap or detergent & lukewarm water solution. Use a clean soft cloth or sponge & as much solution as possible. Rinse well. Dry by blotting with a damp cloth or chamois.
DO NOT USEDO NOT USE window cleaning fluids, scouring compounds, gritty cloths, leaded or ethyl gasoline or solvents such as alchohol, acetone, ammonia, carbon tetrachloride, citrus-based products etc.