I bought these after trying a few things like liquid soap and pretty much got the aligners out. Tried an ultrasonic cleaner. nope It does not work well. tried vinegar. No results. Tried Aquafresh because it doesn't have all the abrasives. Some results, but a lot of cleanup. Tried hydrogen peroxide. This was a very limited result. I ended up trying this Polident 3 Minute Cleanser and also did what the Smile Direct website says (but I have a different brand of tablet liners but basically the same) and that was AFTER they were soaked in Polident . Within 5-10 minutes I use a toothbrush with the rest of the Polydent solution and do a little brushing on the aligners and they look almost new. I suspect if I had used them from the start they might have been 95% clear. Obviously this is the best I have ever used NOT expensive and good to travel! Hope that helps.
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