I do not consider myself an expert, but I have grilled at least 3-4 times per month since retiring from military back in 2013. I have a big 435 sq inch Thermos Charcoal grill and when I cook a couple of slabs of ribs for 4-5 hours I have a lot of ashes. I just close the lid and let it burn out, then save the ashes as my wife mixes it in with soil and compost and puts it on our garden. Only use the plain charcoal not the "match light" type and never use charcoal starter fuel. I use a chimney starter which I made out of an old metal 5 gallon pail Keep unused charcoal in a water tight tote as moisture can and will make it difficult to start. Charcoal does has a tendency to absorb moisture especially if ambient air is humid, so best kept in a water proof container or store it in a large garbage bag.