Not proud of it but I left the passenger side window on my 2013 4G TL open for about 4 days, of which it rained at least 2. I know, it was a brain f@rt!

When I found it there wasn't much moisture on the carpet, leather on the armrest was slightly bubbled up so I wasn't too worried. But I asked my carwash guy and he told me to check under the carpet and I found a lot of water collected and absorbed by the sponge. I freaked out! I took it to my local mechanic and had him lay out towels under the carpet and take out as much moisture as possible. Anything else that I should concerned about?

 

Run a dehumidifier in there and unless there's a problem I wouldn't worry about it.