if you want to try cleaning them heres how to do it, use a really sharp exacto knife to pry the little retaining rings out, but make sure to keep a finger on one end of the ring to prevent it from flying out and getting lost now use the knife to lift the seal out from the assembly and just do that to both sides then spray out well with motor spray and relube, then reseal. its easy to do once youve done it a few times.