To keep your metal folding chairs looking their best and prolong their lifespan, regular cleaning is essential. Start by brushing off any loose dirt or debris. For general cleaning, mix warm water with a mild, non-detergent soap. Wipe down all metal surfaces with a soft cloth or sponge dipped in soapy water, paying attention to areas that accumulate dirt. Rinse thoroughly with a clean, damp cloth to remove any soap residue. For stubborn stains, you can try metal cleaning solutions.