what do you guys do? as the bowl fills with ash it is harder to hit temp running full steam and i am thinking it is because there is so much ash. last night i started the smoker up at about 8:30 with an 18 lb bag. at 3 am i had to add another 9lbs of coal to keep it going. then today at about noon i had to add another 9 lbs of coals. and now as a result i have everything wide open and i am seeing ash fall out of the intake vents and the temp just wont go to where i want it to now. it gets close but just not there. any tips on dealing with this for my next time around?