It’s constant maintenance. I’ve been able to maintain white teeth with occasional touch-up. However I discovered that drinking all dark liquids with a straw dramatically helped maintain my smile. I’m a chronic tea-drinker (possibly quart a day). Water is the only liquid I drink without a straw to make it easy.
Depends, if you’re a coffee drinker like me, you’d constantly need strips before staining comes up again. That’s what I’ve found