Re: friend disagreement
I don't see any reason why waiting to clean them would cause this problem. I have quite a few bowls and tend to clean them all at the same time (once a week). They are vortex bowls. It doesn't seem that they are harder to clean and I've never broken one. I guess the rule should be suggested that a clean bowl be available to you when you want to smoke so you don't have to clean one at the start of your session.