bar soap rubbed on side to glide easier, or sand the excess off
l like Kerram’s idea of a bar of soap. I have also used a candle rubbing the wax where wood meets wood to make it slide better.
Candle wax should do the trick! Rub it over the parts that are sticking!
Candles rubbed over drawer bottoms.
Hi Kelly: I'd sand the drawers lightly, then wipe off the dust and see if they slide fairly well. If not, sand some more and after you're happy with the sliding, rub a bar of soap or a bees wax candle along the top rails of the drawers. That should do it for you. Good luck