Just like the store-bought variety, homemade chips need to be stored in an airtight container to avoid absorbing moisture. Otherwise, they'll become soft and soggy instead of crunchy. Freshly baked homemade chips will stay fresh for approximately 2-3 days in an airtight container, although they taste best fresh from the oven. Just make sure the chips are completely cool before storing them to avoid steam (and excess moisture) in the container.