More drastic measures needed? Bleach can be used if nothing else helps. Protect the area around your Sunbrella fabric when using a bleach solution – bleach may discolour non-Sunbrella fabrics. Please be aware of the environment when cleaning with bleach. Bleach can have harmful effects on the natural environment around you. We do not advise using bleach if you are surrounded by a body of water or another environment that could be affected. If stains and/or mildew marks are severe, the quantity of bleach may be increased. 

• Prepare a solution of 60 ml of bleach and 15 ml of mild detergent per litre of clean water (8 fl oz (1 cup) of bleach and 2 fl oz (1/4 cup) of detergent per gallon).
  TIP: Protect the area around your Sunbrella fabric when using a bleach solution – bleach may discolour non-Sunbrella fabrics.
• First remove the filling from the Sunbrella cushion cover and close all zippers.
• Spray onto the entire area and allow it to soak into the fabric for 15 minutes.
• Remove the stain with a sponge, clean towel or very soft bristle brush.
• Rinse thoroughly to remove all detergent residues. Always rinse Sunbrella thoroughly to completely remove bleach.
  Please be aware of the environment when cleaning with bleach. Bleach can have harmful effects on the natural environment around you. We do not advise using bleach if you are surrounded by a body of water or another environment that could be affected.
• Allow the fabric to dry naturally.
• Ironing will help to recover the waterrepellent coating of the fabric, but only at a cool setting (delicates). As some irons exceed the recommended temperature at the synthetic setting, test a small, inconspicuous area before ironing the entire fabric.
  DO NOT use a steamer or iron set to the steam setting.