Sub Phatty LFO source switch (somewhat) unresponsive

[sublmnl]

My sub phatty just out of nowhere started having an issue with the LFO source switch, it won't register the change unless I press downwards on it really hard. Just wanted to see if anyone else has had this kind of issue and if/how you were able to fix it. I'll probably try some contact cleaner but I don't have any on-hand at the moment. Btw, I'm pretty gentle with it, it's never been gigged with and it's only been moved a couple of times so I was a little surprised that this happened.