Kinda new to this but i have a question that has been plagueing me for a good while.....I have a couple of small scars around my chin area and when i shave its hard to get a totally clean shaven face....i tend to leave a few prickly hairs behind. I have tried stretching my skin as smooth as i can get it but nothing seems to help. I have tried all shavers which commercials claim to leave you smooth......any suggestions???