I pressure wash mine from time to time.
Like any piece of equipment (mower, 4 wheeler, tractor etc) common sense dictates.
example..don't blow 3800 psi directly on wiring harness connections, switches, etc from a distance of 3 inches....
it helps to hose it down with a degreaser before PWing too
when done PWing, blow it off with compressed air or lawn/leaf blower thingie
..L.T.A.