So many modern electronics, fuse boxes, and air intakes under there you should move with care. I prefer to:
1. Wipe down with washless wash
2. Use Klasse AIO on all painted parts and rain gutters/tracks
3. Use 303 on rubber lines and surrounds
No pressure washers, no streams of water, and working on it on a monthly or bi-monthly basis means no need for extreme cleaning and chance of damage.