From our AestheticianShokuh: CleansersExfoliation is key to a refined complexion. Cleansers containing a low concentration—.5 to 1%—of salicylic acid, which is a beta hydroxy acid (BHA) or a moderate concentration—2.5 to 5%—of lactic or glycol acid, which are alpha hydroxy acids (AHAs) stimulate cell turnover and will keep pores clean.
If your skin is very oily, try switching to a cleanser that also contains the antioxidant- Nordihydroguaiaretic acid, or NDGA. There's proof that it maintains clear pores by preventing oil oxidation (an organic reaction with air that causes oil to darken, producing a blackhead) and reducing inflammation and excess sebum. Also, be sure everything you use is oil-free. The idea is to get rid of oil, not add more.