oh good one

I checked all the seals, there is absolutley no sign of a leak I can see. I jacked the car up to see underneath, nothing suspicious there either. I took the carpet up and there's like a puddle underneath it, that's drying out now. I took to the car with a hose, spraying it in all the possible places water might get in, and still no leak. There's just no explaination for it! Help!