Recently, as of just a month or two, my 95 Olds Cutlass Supreme has been getting rain water on the back seat carpets during a rain. The car is parked during the rain, and when I open the back door after the rain has ended, there is standing water on the left and right carpets. More on the right, (passenger) than on the left (driver) side.
I've looked carefully at the door gasketing, and cannot detect any defects. All the metal work appears to be very well designed so that water is transferred out of the car.
I've even sat in the back seat of the car during a rain storm, and have not witnessed any drops forming anywhere, or wet trails (that I can see).
Possibly is there some way that the water could be coming in underneath of the carpeting? It sure stinks when I open the door. On hot days, I try to remember to leave the windows open, to air it out.
In the beginning I was thinking that there might be a hole in the floor, and that the water was leaking in while moving, but it comes in while parked, instead.
Where is this water coming from? The windows are fully shut. The doors are fully closed. The trunk area appears to be dry.
What suggestions might you have?