I get the odd spot and it tends to go a bit out of control in size and disgusting-ness. Washing once a day with the daily facial wash and using this helps me a lot.
I still get spots, but this does work. It stops any puss and shrinks the zit. I normally get a spot that would go out of control for a week or 2, but using this has stopped it and it starts shrinking on the 2nd day and is ready to disappear within the 3rd.
My only advice is to give oxy a week or 2 before it starts working. When I started washing my face I got more spots, but now it's kicked in. It's just how your skin reacts at first.