You should also check the passenger-side window for leaks. The factory screws on my 2000 were rusted almost completely away! The mirror almost fell off while I was washing it.
Mine turned out to be blocked window drains. I drilled through and installed a piece of mahogany and used stainless screws and cap nuts.
2005 Georgetown 342DS XL, Full Banks Package
2005 Liberty Renegade 4X Toad
1989 Wrangler Sahara Toad
1984 19.5' Beachcraft i/o 5.o liter, 4-bbl (and you thought your Moho sucked gas!)
D/W Carole and Maggie the Teacup Lab (Black Chihuahua)