How to keep it away?

I used to have kinda bad acne. Currently I'm on Accutane. Which is an intense medicine but it'll totally eliminate it. All the way through it'll be gone.

What's the best stuff do to prevent it from ever coming back? It's not too likely, but I want to take preventive measures haha.
Updates
+1 y
Oh and I'm very hygenic. That's not the issue.
How to keep it away?
Post Opinion