Exfoliating is manually removing dead cells from the skin, whereas peels (discussed below) remove dead skin cells via a chemical process. There are several skin-care products that contain ingredients such as oats, sugar, and finely ground nuts that are designed to safely remove dead skin cells as the product is gently massaged into the skin.
Normally, dead skin should shed itself daily. But sometimes oil, being adhesive in nature, prevents these cells from sloughing off. As a result, the dead cells can get trapped in the pores along with the oil and generate acne formations. To help put a stop to this clogging up, you can remove the build-up of dead skin cells and excess oils with an exfoliating scrub.
I even use baking soda as an exfoliating agent. You only need to use a bit at a time. Moreover, baking soda is extremely cheap and highly effective. Mix 1-2 tablespoons of baking soda with just enough water to form a paste, smooth it onto your face, and begin massaging. Be gentle though, the baking soda granules are readily effective since they are so small.