How to use roller with serum Clean face apply serum roll dermaroller over face till 10 minutes all over again apply good amount of serum wash face after 3 to 4 hours only not immediately Very effective formula penetrate serum deep layer of skin gives best results Repeat session again after 1015 days depending on skin requirement Clean roller with spirit Quality ingredients results by nourishing and strengthening the skin helping to diminish the appearance of fine lines wrinkles age spots sun spots and other skin pigmentation