3 peterson pipes in last.. 2 months. they all smoke great. no issues with smoking. cleaner will not pass through to the bowl from the tip of the stem. but if i bend the cleaner a little at the tip and move it around, it will usually find the draw hole to the bowl. takes time, but i don't have moisture problem or gurgling. maybe it's just the way they drill the draw hole. looking at their cut out of system pipes, the draw hole is way off center to make room for the chamber for the spit or whatever on the bottom. being production pipes and all, maybe the tooling is set like that for all the bowls.