I’m going through Ortho for the 4th time. I have a removable lower expander. I had been soaking it in water with those tablets for 15 to 20 minutes but the metal always looked dull. No matter how much I scrubbed it, it always felt like there was a layer of gunk that wouldn’t come off. So I soaked it in your solution with water for 20 minutes as directed and voila: the metal sparkled and looked brand new! I recommend Cleanadent Liquid Crystals to all my patients, because I’ve seen how great it works firsthand!