Dear Christy, For cleaning, we recommend spot cleaning the inflatable as needed with a gentle solution of soap and water. To avoid mildew, always dry your inflatable completely after each use and be sure to store the inflatable in a cool, dry place after it has been dried completely. Never leave the inflatable out overnight, even if you have dried it. Moisture from humidity or morning dew can cause mildew. Sincerely, Blast Zone Support