@ShiftGear perhaps this is the negative. I have been pondering that maybe going super low fat isn't the best. If your body is telling you that you need more fat, then just add more in.
You have to essentially cook them again in order to break down the starch that has reformed. I'll put leftover potatoes in the air frier until crispy and heat up rice in a saucepan with butter and whatever else I'm eating it with.