Both Sunny and I have acne problems. I've tried pretty much everything under the sun and nothing works for me. I've just learned to live with it.
Ever since Sunny had his problem, I've been using stainless steel bowls for both food and water. I try to wash Sunny's chin every day and I've been using a little bit of hibiclens on it. It has chlorhexidine in it which is supposed to help. Good luck.