I use a razor which has a disposable 5 blade cartridge/head. I shave every day for work (5 days a week) and sometimes on the weekends if I'm going to see people. I change out my razor once a month. By the end of the month it's really not that good and I can feel the instant difference with a new one.
The point - I just read that you are suppose to change your disposable razor every 5 to 7 shaves! Does anybody do this? Is my keeping mine for a month unusual? I thought I was the norm. What do you all do?