Apple wood chunks can be used multiple times if they are not burned up completely during the smoking process. They should only be reused though if you’re sure that there is nothing left of them once the smoke process is complete. This will ensure maximum flavor and quality for meat products! You also don’t want to put these soaked (or boiled) pieces back into your smoker/cooker after using, so make sure to get rid of any leftover pieces before saving them for future use! These types of wood chips shouldn’t need more than one or two uses on average per piece, but this all depends on how much you have available as well as what type(s) you choose to smoke with.