When using bentonite clay on your face you should apply the bentonite clay to your face 2 to 3 times per week to get the desired results.
You can apply the bentonite clay more than 3 times per week to your face if you want too but up to 3 times per week is usually enough to get the desired results from the bentonite clay on your face.
Mix the bentonite clay powder with water to make a thick enough paste and then apply the bentonite clay paste to your face.
Then leave the bentonite clay on your face for up to 20 to 30 minutes before removing it and washing your face off with water and soap.
You can leave the bentonite clay on longer than 30 minutes but I would not leave the bentonite clay on your face longer than an hour.