Fixed!

Sandie, the spaces in between the sliders are so narrow at the tight spots that I wouldn't be able to sand them down. And taking them off - they are glued as well as having long screws, so dismantling is difficult. It hasn't been that humid here - I think the warp set in some time over the past 4 - 5 years since I have had this table with the leaf in.

I took a tip from robinh - I didn't see how I was going to get paste wax into the narrow openings either. I got my can of furniture polish.

I wedged the narrow areas open with bread-and-butter knives I don't use, and sprayed the polish gently along the openings. I would take one knife and work what polish I could into the crevices. Then I would do some chores, cook dinner, etc giving the stuff time to set. I did three different applications, including turning the table top right side up. I had removed the pedestal.

Finally, I stood the table on end and pushed down again. Nuthin'.

Then I got the idea to lift the table slightly and drop it on its end from a few inches up. Did this 5 times and it worked great! Put the pedestal back on and it's a happy little table!

I'll get a buddy to help with the warps later.

Thank you two so much for weighing in!