If the heater core were leaking, the film would be very difficult to remove and the defroster would not clear it.

The problem is moisture in the ductwork, most likely caused by a clogged or restricted evaporator drain.

Steve


98 Contour SE Sport 2.5 Duratec ATX The wifey's car 89 Taurus SHO - 246K miles 94 SHO ATX - 190K 1997 F-150 5.4L ATX - The Workhorse 150K. ANY THREAD WITH "OMG" or "WTF" ETC IN THE TITLE WILL BE IGNORED!