I'm thinking about two old sayings. A little knowledge is a bad thing and familiarity breeds contempt. As has been said when you are starting out and you start getting some good shaves and you think well, I've got this thing down perfectly and then your guard goes down and you start getting poor shaves. With straight shaving you must always be careful and never let your guard down no matter how many years you have been shaving. Even the most experienced can run into problems if he's not careful.