Try checking the evaporator drain line for the a/c. Could be condensation dripping from the evaporator coils. The line may be clogged or knocked off at the connection. It is supposed to drain out of the car.
Lots of luck, and wear rubber boots until you get it fixed....
1989 560SEL (127k)
1971 Cutlass convt. (98k) (sold)
1978 Olds Toronado (68k) (sold)
1977 Camaro (sold)
1984 300ZX (146k)(sold)
(only a 2 car garage explains a lot....)