Make sure you pack your bowl fluffy, Use 1 layer of Reynold's HD foil, make decent sized (round toothpick sized) holes in your foil, and poke the toothpick down through the holes in the bowl to be sure you have good airflow. I'm not sure what kinda coals your using, but get some naturals (Exotica's, coconara, Smiley's coconut coals). I use Exotica's and I use 1/4 of a stick on an Egyptian clay bowl. I always use a windcover. I get big clouds nearly everytime and I get a 1 hour session out of this set up.