Gillette states that their fusion blades last approximately six months but when I use each blade according to your television commercials recommendation, when the strip turns white it is time for a new blade which is about a week if I am lucky. Now how can the blades last six months according to the advertisement on the pack they come in when each blade last only a week and there are eight blades in each pack??????? According to even grade school arithmetic one times eight equals eight in which is the number of weeks your blades seem to last... read full review »