Because these are a no-bake dessert, there is no “reheating” involved. They are meant to be enjoyed cold, straight from the refrigerator. In fact, their texture is best when they are firm and chilled. If you leave them out at room temperature for an extended period, especially in a warm environment, the chocolate coating may soften and melt, and the cheesecake filling will become too soft and lose its firm structure. If you’ve had them out for a while and they’ve started to soften, simply pop them back into the refrigerator for 15-30 minutes to firm up again before serving.