1. Avoid drinking or eating intensely coloured substances. “Whitening treatments make teeth porous and in the short term so they’ll absorb stains,” advises Dr. Lazaris. OneGritty Pretty guru says, “If you have to drink coffee, make sure you rinse your mouth with water afterwards, and carry a bottle around with. Keep drinking water throughout the day and especially after meals.”
2. “Don’t whiten if you have damaged (decayed) or sensitive teeth. Your teeth will only get worse,” warns Dr. Lazaris.
3. You shouldn’t use at-home whitening treatments on large fillings, veneers or crowns. “They won’t whiten,” explains Dr. Lazaris.
4. As tempting as it might be, do not go trifling with the instructions and go making up your own regimen for a ‘better result’. “The first time I whitened my teeth, the box said 20 minutes for five days, but I did 40 minutes for two days. My teeth were sensitive for a long time afterwards,” cautions one Gritty Pretty gal.