Before we begin, a quick skin care lesson: The T-zone involves an area of the face that spans the forehead and down the bridge of the nose, ending at the chin. (Mentally draw a capital T across your face, and you get the idea.) The area produces more oil for a very simple reason: It has more oil glands. Even if you have dry skin, you’ll likely produce more oil in this area versus on other parts of your face. It just becomes a nuisance for oil- or acne-prone people because their skin tends to overproduce sebum inherently. It also tends to be a much bigger issue when you’re younger, as your skin does naturally dry out as you age. Also of note: Some people find retinoids to be too harsh, so ease into it—start with using it for one night every few days, and work your way up. And never layer retinoids with other exfoliators—that will likely be too much. Instead, alternate days that you use the various ingredients, or just stick to one. “Adjust products depending on your skin and the seasons,” says Farber. “It’s helpful to alternate between a foaming and hydrating cleanser to help oil control and also prevent dryness. Alternating between a lighter, gel-based moisturizer and a thicker oil-free cream moisturizer is also useful.”