i know what you mean mate, i went to the lenghts of sowing one custy my van with ro and di in etc etc
and he still said...
"your doing still squeegy the water off though arent you?"
after i told him about it drying clear :

i really thought he was getting it as well while i was stood there 10 minutes explaing reverse osmosis

turn out he was just stood there drolling and nodding politly :

it made me laugh, the light were on but noone was home sort of situation
