Our products are handmade from glass fiber reinforced concrete. Dirt, oil, or water residue should be removed as soon as possible. We recommend using a mild, non abrasive cleaner, such as Method All-Purpose Natural Surface Cleaner. Spray the solution across the surface and wipe down with a sponge or towel. We do not recommend any citrus-based or highly acidic natural solutions. These will damage the surface. Don’t use heavy, abrasive, bleach-based or ammoniated cleaners to avoid stripping the concrete sealer