Review on 🌬️ Portable WhiteFoam AlignerFresh Spray for Cleaning Aligners,Retainers, and Invisalign - On-The-Go Pack for Aligner Cleaning, Teeth Whitening, and Bad Breath Removal with Bacteria Killing Action. Mint Flavor (6 Pack) by Andrea Olson

I didn't see a brightening but it ended so quickly how has TIME? It says to use 2 sprays per aligner/retainer, but that's not possible. You can't cover every one of them with just two sprays, especially without knowing exactly how much and where to spray with the first spray. I found that the first spray spattered unpredictably where I wasn't aiming, so it REALLY took 3 sprays per aligner. It did NOTHING to whiten the aligner itself. Yummy, but took me a week! It is intended to be used up to 4 times a day. If I did THAT, it would go on for days. Pretty disappointed.