Disposable razors are for limited use. In general, they can last three to 10 shaves, but the best indicator it’s time to replace a disposable razor is when the blades become dull. When you’re ready for a new razor blade, you throw away the entire razor and grab a new one.Click to see full answer. Subsequently, one may also ask, can you use disposable razors more than once?The amount of time you can use and reuse your razor blades actually depends on how often you use it and how you take care of it. If your disposable razor no longer shaves seamlessly after three weeks of use, then this means that you should regularly change your disposable razor every three weeks.Similarly, how often should you change your disposable razor? While it depends how often you shave, and how thick your hair is, most dermatologists suggest replacing your razor blades every FIVE to SEVEN shaves. Even if you rarely shave, the switchover should never be longer than a month because of the bacteria that builds up in between uses. Considering this, how long do Gillette disposable razors last? five weeks How many times can you reuse a safety razor?On average, you should and can expect to change safety blade razors every week. That’s approximately every five to six shaves, plus or minus a few. That’s assuming that you are making three passes in every shaving session: with the grain, across the grain, and against the grain.