Regular cleaning with a soft brush and soapy water is important to ensure debris doesn't build up and become more difficult to remove. Alternatively, the product can be cleaned with a high pressure cleaner set at moderate. It is also important to place cushions in an upright position when not in use to ensure optimum drainage. Please note that despite the anti-bacterial protection in the cushion core, mildew can still form on the inner and outer covers if not properly drained or cleaned. In case of food or drink spills, wash the spot immediately with warm soapy water and allow the cushion to dry in an upright position. For stubborn stains, carefully wash with a recommended stain remover such as Vanish Oxi Action or a high pressure cleaner with moderate strength. Cushion covers are machine washable at 86 degrees.For winter storage it is best to store frames indoors and cushions in a ventilates room.