Upholstery Care and Cleaning One of the best ways to keep Sunbrella® fabrics looking good is to brush off dirt before it becomes embedded in the fabrics and wipe up spills or clean soon after a stain occurs. The quicker you clean spills and stains, the easier they can be to remove. With a new spill or stain on your Sunbrella fabric. • Blot (don’t rub) liquid spills with a clean, dry cloth. For oil-based spills, apply an absorbent such as corn starch, then remove with a straight edge.