Is moisture! A lot of people use Proactiv and other products with a high concentration of acne fighters and think they don't work or that they become more oily. That happens because they are so drying that before you dry out your skin compensates by producing more oil. At night after you wash use a lightweight oil free mositurizer and it will cause your skin to produce a bit less oil thus not clogging your pores and/or causing as many zits. :)