If you have hardwood or tiled floors, and an early or pre-walker in the winter, what did you do about cold feet?

Socks are problematic on our slippery hardwood. I know pre-walkers should really learn to walk barefoot, but even with the heat on, LO's feet are cold. She is just crawling and pulling up to stand on everything! Slipped and fell more times than I could count today.

Did you use Robeez or something else inside? Or did you just let LO go barefoot? I've been putting her in footed pjs with rubber bottom things.