It Depends on the Individual
At ModernGent.com, barber Daniel Rouah recommends using a new blade every six or seven shaves. How long a blade lasts depends on individual usage patterns. One person may make a razor last several weeks, while another may only have a few days. If the razor no longer shaves as closely or irritates the skin, it's time to replace the blade.
Extend the Life of Your Blade
With proper storage and maintenance, you can get more use out of your blade. Rinse and dry the blade thoroughly after each use. Store the blade in a dry place to prevent corrosion from moisture. You can also sharpen your razor by running the blade 10 or 12 times in each direction down the length of a denim pant leg.
According to the Discovery Health website, there is no set time frame for replacing your disposable razor. The best option is to pay attention to performance and extend the life of your razor with proper care and maintenance.
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