Using soap as a cleanser on dry skin on face areas greatly exacerbates the problem. Soap robs the skin of all its moisture, including its natural oils, which is essential to good skin health.
Since soap acts as a detergent, it is better to refrain from washing your face at all if soap is your only option. In these cases, simply use water to get off as much dirt as possible. However, for maximum results, use a gentle cleanser made for your specific skin type.