[husker boxster]

1st, it's not normal for a Boxster to be sitting outside and be fogged up. Your carpets will be like sponges and retain any water. You can do all the cleaning you want, but if you don't address why the water's getting in, you'll be repeating the cleaning process over and over again.

The three reasons you could be getting water inside:
1. Your drain holes are plugged.
2. A window is down. Micro switches can go bad and let the window down 1/4".
3. There's a problem with your top - hole in it, the plastic window is cracked, it doesn't seal properly along the windows or windshield header.

There are plenty of threads on these 3 items.