I agree with Gr8stuff, It only needs to be used once in the evening or even once everyother night, and you will still get great results in good timing. 0.1% is the strongest, 2 and 3 times is too harsh on the face and will cause a lot of irritation. I use 0.05% and that is strong enough for me, so if cutting back doesn't help, best to switch to a lower strength.

