Over cleansing with harsh chemicals can actually create more oil. When you strip your skin of its natural oil, it feels the need to produce more—it overcompensates. This leads to a vicious, unwanted cycle of excessive oiliness. Be sure to cleanse and hydrate with products formulated for oily skin and ones that are free of chemical, oil-stripping solvents.
Oily skin types often skip the moisturizing step for fear of introducing more oil. My advice: skip the heavy cream and try a water-based serum, like my Essential Hydration Calming Serum. It suppresses the skin's inherent desire to produce unwanted, thick oil and it absorbs more readily so there’s no slippery residue.