Lubing is good, but most used a thicker grease and that collects a ton of dirt over time. Make sure to clean them out thoroughly with some sort of degreaser/brake cleaner before you do any lube. Mine had rust and dirty grease and were absolutely locked up and wouldn’t budge. I sprayed mine (pass side front and back) with a half can of brake cleaner and got them moving first. sprayed again with brake cleaner to finish rinsing out the crud. Then white lithium spray all the moving and pivot points. It slides like new.