<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">I just toss them in my chimney lighter for the next cook - after all, they're now charcoal! </div></BLOCKQUOTE>
Same here. You'll need to add fresh wood chunks each smoke, but do reuse the unburnt stuff.