I love sweet potato too. I just cut off what I need then put the rest in the crisper. It may get a little discoloration on the cut end but I just cut a sliver off before I use it next. I can keep it for a week or so and it's still good.. Just got onto Parsnip chips. YUM. I will microwave Sweet Potato, white potato (small) carrot, parsnip and pumpkin all cut into chips until almost cooked then place under the grill under crispy. Yum, yum, yum.