Window Regulator

A good white grease is not messy or runny. Yes, it can attract dirt but usually it's clean inside doors, as air tends to move out (from interior) and not into those areas. Use just enough 'lube' to keep rollers and gears coated and only small amount of clear silicone spray in the felt channels that the glasses slide up and down on. You'll know there is too much if it appears on glass surface - but easy wipe-off. Also use some car polish on these surfaces to reduce friction from horizontal window felts.
When I mentioned the signal cam it was because this is yet another part that is prone to drying, hardening and cracking. The 'cam' is the part attached to signal light lever in column. Factory ones were fairly heavy duty but eventually failed due to age and hardening. Applying plenty of grease to all the surfaces will extend life to the cheaper replacements. Hint: if either side of signals won't cancel after completing a turn, part of cam mechanism likely broken. Sorry for a bit off the topic but whole point is that everything on a vehicle that moves will need some type of lube.