On the sides, I would NOT recommend using the pressure washer, as the decals will not handle that pressure very will. Although, I do my roof with a 1200 psi unit, but I do not keep the tip close to the roof or in a narrow spray pattern. You will be amazed at how much dirt comes off the roof/AC unit. Just remember not to use a narrow stream and keep the tip well away from the roof. I use Tetfortd Roof cleaner/conditioner with it. I repeat this every 6 months.
As Tunce the traveler suggested, we use car soap and a regular hose/brush.
Just my thoughts,
2013 Jayco Eagle 284BHS
250Watt Grape Solar Panel, MorningStar MPPT 60 Charge Controller
1500 Watt Ramsond PSI, 2 Trojan T145 Batteries (260Ah)
2 - AirSight Wireless IP Cameras (used as rear view cameras)
EnGenius WI-FI extender, D-Link wireless (n) modem
MagicJack Internet Phone
2012 Ford F150XLT, EcoBoost w/3.73
157" Wheel base, HD Towing Package
Our Solar Album http://www.jaycoowners.com/album.php?albumid=329