To keep your panels looking good for years, we recommend using EXTRU-BRITE panel cleaner or one of the other panel cleaners listed on our, Cleaning and Maintenance Recommendations Sheet. Read and Follow the directions on the container label, take safety precautions when handling and note the cleaner should be diluted per instructions before use. Never use abrasive cleaners, chemicals or brushes on your panels. Do not use cleaners that are of a solvent based (anything distilled) or contain a caustic acid. Using a recommended cleaner as needed will keep your walls and ceilings looking good for years to come.