Hello!
What year is your car?
Mine had similar issues when I first bought it and it turns out to be a known fault. Don't quote me on this but believe it to be moisture ingress. Thankfully, I got mine all completely replaced with new spec parts for free from the dealer under warranty. If you bought yours from a dealership that offers 3 month warranty or whatever, then definitely pull them up on it. It took some concocting for mine, but they did it eventually.
Cheers,
James.
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