I have to agree. Wood quality and placement solved the problem for me. I'm using wood we've sourced and seasoned ourselves. I hate to sound like a vulture but keep your eyes open for trees that are dying or have gotten knocked around or down during a storm. Offer to cut it down for free and reap the benefits of a little work. I find my number 2 gives the best results if I place a chunk 3/4 of the way toward the back.
