I do not have an ash trap of my insert and I'm burning 24/7 (well, mostly). It is a nice day today so I'm not adding splits, but I have a good bed of coals to make getting a fire going later this afternoon much easier. I'd like to clean ash but keep the coals. Is there a trick to doing that, or am I best to let it burn coals burn down, clean all of it out, and start over again?