Wash your face with a mild cleanser or warm water. Pat dry your face with a towel.
Apply your banana face mask all over your face (and neck, if you like), leaving out the eye area, mouth and nostrils.
Leave the mask on for about 15-20 minutes. Then, gently remove the banana with a warm and wet washer. Rinse your face (and neck) with warm water to get rid of any residue.
Finish with a serum and/or a moisturiser (I've got a few recipes for them here on my blog, too).