V70 condensation

On my 97', I did a search and some say its (usually) either blocked vents, the pollen filter (where is it on the V70?) or the matrix. I am quite sure the matrix is ok as there is no damp carpets, smell ect ect. I do however have water getting in at the front of the drivers window just above the speaker, also where is the pollen filter, and how do you know if/when it needs changed?

If you search in the technical area it may help.

This should help.

Thanks for that jim :)