Wash your face. For the same reason you remove your old makeup, you should also wash your face; leaving grease and sweat on your face can give a fresh cover of makeup a shiny, caked on look after several hours. Use a face detergent to gently wash your face, spending about one minute of scrubbing to remove all bacteria and dead skin cells in your pores. Finish up by applying a facial moisturizer. Dry skin will look flaky to start with and gain oil to compensate later on, so be sure your skin has been treated with a bit of lotion.