very misty

[Tam the man]

got a 94 corsa and the thing keeps misting up (well not any more coz its sunny). but when it rains and its cold the damn thing keeps steaming up. i have to use that halfords interior mist stuff all the time. really annoys me.

[DaveB]

open ur window abit then.lmao

[Squiffy]

Sounds like you need a new cabin filter mate, some Vauxhalls are notorious for it. All air entering the inside of the car comes through this filter, now water can get into this filter quite easily, especially if the scuttle panel and surrounding plastic trims aren't replaced properly. Damp filter = misty windows, especially if you have the heater on. Damp warm air is tops for steamy windows!

Get down Halfords and £10 or so lighter you'll have a new filter, Haynes will explain how to fit it, it's easy enough to do.
Just make sure you put everything back properly, I still have to change mine once a year (which I think is actually the recommended interval).

Good luck!