Used them 3 times in a year on my 5'ers so far and no issues,
it's actually time to go back - got bugs on the last trip !
they are pretty experienced with rv's and if you don't like the high pressure, you can probably ask them to just use their brushes...they seemed pretty soft when I was watching...
'11 Monaco Diplomat 43DFT RR10R pushed by a '14 Jeep Wrangler JKU. History.. 5'ers: 13 Redwood 38gk(junk!), 11 MVP Destiny, Open Range TT, Winn LeSharo, C's, popups, vans, tents...