On a similar note, I will also not recommend anything on a relay contact pin, however something on a sliding connection (like a spade connector) can help if the design is missing a weatherpack seal.

My neighbor had a ford focus that would throw an input speed sensor error, after 4 sensors, and literally a tube of silicone grease. He asked me for any insight on the trouble, I saw that the connector was missing the weather pack seal and also the center plastic piece that kind of locks the pins in the plastic housing. (the connector was installed and removed way too easily which brought my suspicion)

after pinning a new connector in it the problem went away, didnt apply any grease either, infact washed away all of the grease he slathered on.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)