Squeaky Bedroom electric tack & pinion slide

[Wrayj1]

My slide with bed in it was squeaking very loudly when I deployed and retracted it.  it's electric rack and pinion.  I removed the plywood cover, did not see anything unusual.  I lubricated with dry silicone the track, rollers and other parts that might need lubrication.  I also deployed the slide and lubricated the track from the outside as far as I could get the silicone lubricant into the mechanism.  I deployed and retracted the slide 3-4 times and the squeak seemed to be much less than previous to lubricating, but still there.

Any other thoughts would be appreciated. 2007 Holiday Rambler Endeavor 40 SKQ.

Thanks