Just a couple weeks ago, mine were sounding loud. I sprayed a dry Teflon (that is actually very wet out of the can then dries to a white powder) on all the pivot points. It worked pretty good. Needs a second application at a different position so I can get better coverage. Note on the dry Teflon is that you will need a clean soft rag to wipe off the overspray and drips-runs. Works well so far though.