Over the past few years, my bubbler has accumulated quite a bit of resin and I would LOVE to clean it because its starting to taste bad and it will probably be clogged soon. I've tried soaking it in 90% isopropyl alcohol w/ salt, shaking, and rinsing with warm water. This just isn't working and I'm sick of wasting my family's rubbing alcohol. I was wondering if anyone had any experience with commercial pipe cleaners such as Formula420 and Grungeoff? How well do these work and which ones do you suggest using? Thanks.