To store homemade fish sticks, let them cool and place them in a single layer in an airtight container; they'll last up to two days in the fridge or a month in the freezer. For reheating, pop them in an oven or toaster oven preheated to 375°F for 10-15 minutes if refrigerated, or 15-20 minutes if frozen, until they’re heated through and crispy. The air fryer also works wonders for a quick crisp-up at 350°F, taking 5-7 minutes from the fridge or 10-12 minutes from the freezer.