2000 Saturn LS2 soaking wet carpet HELP!

I have a 2000 Sauturn LS2 with roughly 80,000 miles on it. Around 1-2 months ago I had the blower motor and blower motor resister replaced to fix my A/C. Now last week my carpet on both sides of the car has became mysteriously soaking wet. It has rained some but not on the day I noticed the liquid. I believe that it probley is water because there is no odor in the car. No check engine lights have came on. Took car to the shop and they did a water leak test and found nothing now they want to pull up carpet and take out panneling to search for source. What to do?