Or right thanks people.I hope it is this pollon filter that is at fault.

I know my mams old focus had the same fault but her carpet used to get pissy wet.Im sure my dad just cilyconed the scuttle panel.

Mu mate has a 06 focus and has has shit heaters too.I had a look at ir a few months back.The pollon filter looked new.At the time i didnt think abour checking it without the filter in