[hydrashok]

@pawan, I had a similar problem a couple of years back. But in my case, the carpet of the driver-side as well as passenger-side footwells were wet.

The problem was with the A/C dumping water into the car from some part behind the dashboard. The service people said this is a fairly common problem.

(This had nothing to do with washing the car, though. Some piping somewhere in the A/C's line got choked, and that was fixed easily). Try feeling behind the dash (right behind the center-console and see if that part is moist/wet. If so, the water is coming from the A/C.