There’s not much you can do to your skin that’s worse than going to bed with your makeup on, but not knowing how to remove your makeup properly comes pretty close. Throughout the day your makeup collects pollution, grime, and bacteria. And you can double the amount it collects if you have oily skin as the oiler your skin is, the easier it’ll stick. Leaving these unwanted impurities on the skin for longer than you have to can cause free radical damage, leading to a whole bunch of skin concerns such as irritation, premature ageing, and acne.