Never use soap on your face. Most soaps contain drying ingredients which your facial skin don't need. Look for a facial cleanser that's gentle on your skin. So, how often do you need to wash your face? Once in the morning and in the evening is best.
When you are done cleansing, rinse thoroughly and repeatedly to remove cleanser. Use tepid or lukewarm water to rinse your face. Too hot or too cold water could irritate skin. And remember, cleaning involves more than just a cleanser. You should wash your hands thoroughly before you even begin washing your face. Then, dry your face by gently patting a clean towel; don't rub!