I have used bio claire 4 about 2 months mow and it really worked in the 1st 2 weeks but think my skin is getting darker now... how can I maintain the light tone?

I'm currently using Bio Claire at the moment.
Many people have said that it worked for them but then found it difficult to maintain the effects.
I'm guessing you should exfoliate regularly and use Bio Clare twice a week? Or even find another crème and keep switching in between the two.