One of mine started squeaking a few years back, stopped with a slight tighten of tension bolt, came back sometime later and despite trying different stuff, squeaked for a good long while and I almost got used to it. Tried putting proofide in a few places and it hasn't squeaked for a few years now. Cuz I tried multiple places at once, I'm not entirely sure which one did it.
Glad it stopped though, was annoying sometimes.