White13glanza

Everytime the glanza gets wet, or a bit damp, the front wipers turn on and wont stop till I switch the engine off and let the glanza dry off completely. It can take days for it to stop. Drives me nuts and I look like an idiot with my wipers on when its a sunny day lol. Has anyone experience the same thing and tell me the problem or does anyone know where to start and look for the problem??? Thanks Ric