How To Clean Sunbrella Fabric Awning. Sunbrella® fabrics do not promote mildew growth, however, mildew may grow on dirt and other foreign substances that are not removed from the fabric. Hose down fabrics on a monthly basis with clean water, which helps prevent dirt from becoming deeply embedded in the fabric and eliminates the need for more thorough cleaning.
Pour some of the mixture into a spray bottle. Clean with soft bristle brush. 303 should be applied to sunbrella® fabrics after each thorough cleaning, which typically removes the original fluorocarbon finish and reduces the fabric’s water resistance.
Clean with soft bristle brush.
Prepare a cleaning solution of water and mild soap. To clean sunbrella while still on an awning frame, follow these simple steps: • brush off loose dirt. For tough cleaning jobs to get rid of dirt and mildew, prepare a cleaning solution of water and mild soap or dishwashing liquid.