we have three eva drys one is a quart placed in the slide by the kitchen/dining table
the other two reside at the ends of the coach, these work well, although i have had to replace the fans on the small ones and they are three years old.
this year we have been trying a new approach
after showers we wipe down the walls, open a vent for a few minutes on high fan and set the rear a/c to DRY for 2hrs.
seems to help so far.
last year we tried leaving a vent open partially...but it felt COLD
but when the humidity is 90% or higher......its a challenge
so i ask the dog to breath on odd minutes and i breath on the evens
sorry i couldn't resist