Seeing I am relatively new to straights I can sympathize with you on the chin area. That is my bane still and I am still looking for the best way for my face. Luckily I do not mind a little stubble currently so I do not do any touch ups with a disposable. Hopefully in another 2 or 3 months I will be successful in a completely clean shave. The rest of my face is normally BBS and I only need to shave every 2 or 3 days in those areas.