Coffee and tea stains add up, but whitening gels offer a gradual, reliable fix....

https://technivorz.com/what-should-i-do-if-whitening-gel-irritates-my-gums-a-practical-guide/

Coffee and tea stains add up, but whitening gels offer a gradual, reliable fix. I tested the latest formulas to see which brighten your smile without damaging your enamel or causing sensitivity. It’s about consistency, not miracles