Your airbag is not machine washable.
Regular cleaning (damp cloth): remove the In&box, wipe the fabric parts with a damp sponge and a little soapy water, taking care never to wet the back of the airbag (the electronic part), then let it air-dry on a hanger for 12 hours, out of direct sunlight.
Water jet: remove the In&box, the inflator and the back protector, hang the airbag on a hanger and rinse it with clean, cold water (stay at least 3 ft (1 m) from a water jet, or 6.5 ft (2 m) from a pressure washer) for 10 minutes maximum. Never wring it out.
By hand: soak the airbag in cold, lightly soapy water without wetting the aluminum nozzle, wash it gently without twisting it, then rinse, for 10 minutes maximum. Let it air-dry on a hanger for 12 hours.
Full procedure in our help center.