★★★★★
I would suggest doing some reading online but essentially the method involves taking a fresh banana peel (yellow with brown spots works best, do not use green) and rubbing on the face for up to 10 minutes. The peel will get discoloured from rubbing on the face, and when that happens, new peel area should be used. Let this sit on the skin for some time. Some articles I read advised doing this up to 3 times per day.
I have pointed my family member in this direction and will report on the results. Surely if acne is severe many other measures should be taken, but this seems like a cheap and easy ritual to add in. It's all about good habits and remedies adding up. I wish I had known about it years ago!