Apply your soap on your skin, massage it in and let it act for a few minutes before washing or rinsing it off. 

Most times when we take our bath we just scrub our bodies very quickly and rinse without giving the soap time to treat the skin.  

Unlike body creams or lotions, soap doesn't have the time to act because we don't allow it to stay on the skin long enough for it to do its work. 

Give your soap two, five or ten minutes on your wet skin before you rinse it off for better results. But take into consideration the intensity of the soap before leaving it on your skin for long. 

I don't advise you to use harsh products but if your soap is harsh or aggressive then don't leave it on. Wash it off quickly. 

Hope you find this tip helpful.