92bimmer 3/17/2010check to see if it smells like radiator coolant, also feels slimey. If it does then your heater core is bad and needs to be replaced.
this is something you will need to have someone check asap. This is usually the case when have a wet carpet on the passenger side.
john 3/18/2010heater core needs replaced or bypassed . but will have to pull dash out of car to replace