Volvo Repair: wet floor volvo 960, 1996 volvo 960, volvo 960

Question
i recently noticed that the floor of the rear seat behind the passenger of my 1996 Volvo 960 was very wet. I checked the front passenger floor and found it also was wet but not as much as the rear. I have looked for any damp areas at the sun roof and see no staining from moisture. Do you have any advise where I should check next. Thanks in advance for any help you can provide.

Answer
Marty, Did this occur when the A/C was running? if so, then it sounds like the A/C drain is clogged. If not then I would also see if there are any obvious gaps in the windshield trim areas.  Is the wetness clear or a coolant color? Let me know.  Roger