GTA gone :( Punto
Sporting Cheap Fun
Join Date: Mar 2009
Location: United Kingdom
The most likely cause is the blocked pollen filters.... I had a problem with my 156SW a few weeks back, took the filters out and replaced them and problem solved. Its made worst a this time of years as the air con wont function below 3 degrees, which takes a lot of the moisture out. Search the forum for pollen filters and I found pictures on how to remove/replace them.
Other possibilities are a blocked outlet pipe from the aircon unit. Also you could be losing water from the heater matrix, but a quick check of you water level will hopefully squash that idea.
If you suspect water ingress / windscreen leak, then bear in mind the carpets are plastic lined and will not necessarily feel damp. To check undo a front door sill, and get your hand under the carpet. There is loads of info on if you search the forums.
147 Ducati Corse
MiTo 1.3 JDTM-2 (95) Lusso