These are best the day they're made. Adding potato and or other starches keeps the dough soft and doesn't harden as quickly as it sits in room temp or as it cools. You can place them in the fridge if you can't finish eating them but they will harden since the fridge is colder and because they're made with rice flour (rice always hardens when refrigerated). Feel free to steam it to get it soft again. I don't really like to microwave them as they can burst.