Apply morning and night on clean, dry skin. You will see results from the first time you use it. This particular combination of essential oils cleans the skin, removes excess oil, regulates the secretion of sebum and acts as a mild antiseptic. The sebaceous glands are tiny glands in the skin. They lubricate and waterproof the skin and hair of mammals by secreting an oily/waxy matter, called sebum, which in some cases can create problems.