Crest white strips classic

Question

it says... Use on ur upper and lower teeth TWICE a day for 30 minutes...

but would it still work if i use it once a day insteed of two.

Answer 1

i'm sure it would still work but it's probably goona take double the time to get the whitened..

they work very good. i used them 3 years ago and my teeth are still very whight.

Answer 2

it should but its going to take longer

Answer 3

it will probably take twice as long for your teeth to get whiter but it will still work.