leaves behind so much gunk
I've tried many brands of white strips, but I've never used one that left as much goopy slimy snot-like gel on my teeth as these did.  For those with texture issues like me, it's pretty gag-worthy. They fit well and stayed put for the 30 minutes, but not sure about the long-term whitening ability of them because I can't bear the thought of having my teeth feel like they are covered in ectoplasm again.
Rating: 2 stars