95 SC2 power windows -- how to lubricate?
 

My power windows seem to be slowing down and occasionally hitching/jerking in the up direction.

I've cleaned the trim pieces where the windows exit the door with partial success, but more is obviously needed after 14 years of use.

Which moving parts do I lubricate and with what? Also, what should I be inspecting for wear while in there to ensure continued functionality?

Also -- is it a sealed motor or can that be lubed too?