Avoid prolonged contact with greasy substances and/or colourants which could not only be absorbed by the covers and leave permanent stains, but also destroy the fabric. For frequent washing: use water and liquid, non-abrasive, colourless detergents with a neutral pH. Leave the detergent to act for a few minutes, if necessary. Rinse in plenty of water at a temperature of no more than 30°C. If you use a pressurised device, hold the nozzle at least 60/70 cm from the surface of the product. Repeat the operation, if necessary.