[Szalkerous]

I had this issue, and it was a bad seal around the permanent glass on that side.

Some caulking and never had another problem.

Whatever you do, take the carpet out and let it dry. I had to replace a whole carpet because the water was standing and grew mold under it. Not to mention the formation of rust on the floorboards will lead to eventual floor rot. Needless to say I just gutted the car and cleaned everything nicely, sanded and painted any rusted areas and called it a day. A very expensive one.

-sz