I have a very small begnign mole on my face (I had it cheched by a dermatologyst). It is about 1mm diameter and flat, but very dark, and I would like it to lighten it. I heard that by applying lemon juice or pineapple juice on it 3/4 times a day it could bleach a bit. Is it safe to try this method? The worst thing that can happen is that it could not work?