I don't think it's rings per say that is the problem but rather, taking several deep draws to quickly. I know clouds and rings look cool but I think that the lethergy/headaches/dizzyness caused by aggressive smoking takes away from the fun and relaxation that I look for when I smoke. Basically, your getting too much CO2 so i'd suggest changing the way you smoke, drink plenty of fluid (no booze!) eat some fruit when you smoke. Your body will thank you.