To clear up acne wash your face with a mild soap, then put egg yolk on your face and let it sit for 10 minutes. Wash it off with a warm wash cloth. Repeat this every night and within a few days you should notice a drastic difference.
I was told that egg yolk carries Vitamin A, which is often what dermatologists use to clear up acne. This has worked beautifully for me every time I used this technique.