An ash collector is convenient, but emptying it can be a dusty, unpleasant undertaking. Here's a way to minimize mess. Once the grill has cooled, remove the ash collector and place it into an empty grocery bag. Pull the handles to close the bag tightly around the collector, then flip the thing over. Most of the ashes will fall into the bag; tap the pot against the ground to knock stragglers loose. Finally, remove the collector from the bag and put it back on the grill.