I got blue stains on my teeth from pap whitening strips

[spazdex]

I tried to use fucking pap whitening strips and now I have blue stains on them from a shitty ingredient. It’s been currently 4 weeks or some shit and they are almost gone.
I was planning to buy crest whitening strips. Will the sensitive version do its job? Like they used less peroxide but it should give me the same results but it will take longer right?

 

[Gandy'sOrbitalVecto]

I used Opalescence GO

 

[spazdex]

View attachment 5223326

I used Opalescence GO

Will check it out, but can you show me your results