my demister on my 2003 sti is RUBBISH! if the window is damp outside,it takes forever to clear, and even a bit of condensation on it wont clear in 20 mins of havin the damn thing on. all i get is a little bit where it clears round each line. i wish i had a rear wiper!

anyone else have the trouble?

 

check the connections - are they clean and sound? it might not be conducting properly.