I am so tired of this - the idea has been proposed several times since I joined here over thirteen years ago. The thing is, NO ONE to my knowledge does anything but propose the idea - no one wipes it off and tests to see if the car will run right.
Wipe it off and put it back in and tell us what you get. The rest of us didn[t do that, we simply threw the part away.

In MY case, the sensor looked fine, there was nothing to wipe off, so I changed it and that took care of that. If we keep asking the same question but not trying the experiment, we will never know. But I STRONGLY suspect it is heat related, as it is always reported (almost always) that the car starts after sitting 1/2 hour and runs for a while or a few days, then fails again.