AU demist problem

[tomson]

I purchased my AU1 from my brother in law 12 months ago 64000kms which he bought from new a great well serviced and looked after car but have a problem with the windscreen demist.With the setting on screen demist there is only about 5% air coming through the right screen demist and 95% on the left demist so on a very cold morning it takes a very long time to demist the inside drivers side of the screen (dangerously so)I mentioned it to him and he said that he had never had any problems with this.Now i am wondering about the instrument cluster which i removed to replace the clear plastic cover because i accidently sprayed some Armoural on and wrecked the original one (warning to others)Could i have moved something behind the instrument cluster when i removed and replaced that might have messed with the demist settings.Your help would be greatly appreciated.