My kitchen ceiling light is known to not work during periods of high humidity. Last year I replaced the sockets that the (2) bulbs get twisted into, and the problem seemed solved.

However, during a recent about of high humidity, the two bulbs weren't working once again. Once the humidity subsided, it works. This now happens over and over this year.

It's an old fixture, maybe 30 years. Can the ballast be affected by humidity?