tuner spray and no FM

[Jeffhs]

My 1980-vintage Zenith H480 AM/FM/FM-stereo clock radio was working great on AM and FM until I shot some contact cleaner into the slide pots. Now the FM is almost dead, but the AM band works as well as it always has--long distance reception, hi-fi sound, all the hallmarks of pre-GoldStar Zenith. I say the FM is "almost" dead because I can hear FM signals very faintly (but not in stereo) with the volume control at maximum, almost like superdeez's Koyo radio. The stereo indicator and the dial lights are out as well. What did I do wrong? I never thought a shot of contact cleaner could cause this much trouble. Did the stuff short out a transistor, the stereo MPX decoder IC, or...?