Seat track lube

I don't like any sort of "grease" there. Anything greasy will attract dust and dirt like a magnet and you'll eventually get the crusty crap that you cleaned up in the first place. I prefer a dry spray lube. Something like this.

https://www.grainger.com/product/16...92&ef_id=e3b2e6555e951e7a5d45b92ae4625590:G:s