It depends, mine stays outside, tyree sap, bird droppings, maple tree whirly gigs. If bad I hook up the hose, low pressure and then soap, sponge in a bucket of water. Six whitewalls (
), water wand Wesley's with a brush. Wash the rest from top down. Dry with an old towel. If "clean", a dampened fiber cloth and dry towel. Then spray Turtle wax (ICE type, no white residue).
Paul in CT