the only problem with using epsom salt is that it eventually leaves tiny scratches on the inside of the bong. Those scratches then lead to it getting dirtier quicker. But when you buy commercial cleaners most of them use rounded silica so it doesn't scratch. So what I usually do is buy 1 420 cleaner a month, and like 2 bottles of rubbing alcohol 90% proof. Then I clean my piece with the 420 cleaner till it runs out and refill it with rubbing alcohol. You can usually refill it about 3 times before you run out of the little beads. And thats how i get around it, and I clean my pieces at least once a day.