Fleetwood Excursion (and others) slide outs slow and jerky

Randy A wrote:
The slide outs on my 2005 Excursion are not working as smooth and fast as they were. I have lubricated the chains and screws. Does anyone with a Fleetwood Excursion, Discovery, Providence or other similar type slide outs have any tricks or helpful hints to keep the slide outs working smoothly?