New 2001 Insight owner, think I might have same problem
I just bought my Insight last night at a Toyota dealer not far from town, its a 2001, 48k miles.
It was a bit "wet" smelling inside and the dealer said it still needed to dry out after the detailing and he had the heater blasting which I promptly turned off for the drive home.
This morning I noticed the passenger side carpet was sopping wet! I've taken it to a car wash vacuum to suck out most of the water, and paper towel mopped up what I thought was the rest, but after another brief drive it seems to have gotten a tad damp again. Not sure if I missed some, or if it is leaking back in again.
The car came with a 3k mile warranty which was cool, but after reading this thread I'm not sure if I should bother fighting with the dealer to get it fixed, or if its just such a common problem I should just cut my losses and start taking apart trim / carpet and finding places to seal leaks myself.
This is Washington state, so it does rain here sometimes. :lol: