I noticed today while installing the FT upgrades that some of my ball links are not moving freely. They look clean and It's just a few of them, but i.e. the right steering link will just stick to any position I move it, it's that bad. I sprayed them with some graphite spray and it helped some, but still not as smooth as before. This is after just a few runs on sanded astroturf, no fine dust. Any ideas on how to fix them?