A question for the Karcher window vac owners

[Cairngorm]

We don’t have silver screens , so the Karcher is required to shift the worst of the moisture. Usually we start the engine to keep it dry. However I looked out a clip on fan that we bought for the Indian summer and it was very effective in moving the air around and keeping the screen dry till the mh was up to temp from the engine.

 

[Bustup15]

Used a Karcher last weekend on 40' static van with large full height windows all round, including 2 shower screens and a full length wardrobe mirror took about 40 minutes. No spray or leaks and streak free.
I'm well impressed and think I may change my vocation!