How often should I change the blade on an adjustable safety razor?

The frequency of blade replacement depends on your shaving habits and the coarseness of your hair. Generally, you should change the blade every 5-7 shaves, but if you notice tugging or discomfort, it's time for a new one. Using adjustable settings to extend the blade’s usability can help, but sharp blades are essential for a smooth and irritation-free shave.