Which chemical peel is best or how many sessions needed to fade melasma completely? (Photos)

Hii im 25 year's old indian female . Around 2 year's back i had melasma on my cheek my dermatologist gave me hydroquinone 2% it worked good but melasma came back again but now its on my both cheek & on nose also i went to dermatologist in ohio and she gave me azealic acid15 % and tretnoin cream after almost 3 months of using them i can still see brown patches on my face and its very disturbing.which peel helps to fade melasma completely.