Razor Blade
Change a razor blade after 5 to 10 shaves or every two to four weeks, depending on use. A dull blade tugs, irritates the skin and rusts.
After 5–10 shaves, depending on use
How often you should change a razor blade depends above all on how often and what you shave. As a rule of thumb: after about five to ten shaves or every two to four weeks. Someone shaving a heavy beard daily wears the blade faster than someone who only occasionally shaves their legs. So it is actual use that counts, not the calendar date.
The reason for the regular change is twofold. First, the blade goes mechanically dull: the fine edge wears with every shave and from hitting hair and skin. A dull blade no longer cuts the hair cleanly but tugs and pulls, which leads to razor burn, red bumps and ingrown hairs. Second, a used, wet blade is a collecting point for bacteria and starts to rust.
Hygiene is the second important point. In the damp gaps of a blade left lying in the shower, germs multiply and rust sets in. Neither belongs on skin, least of all with small cuts. Rinsing the blade thoroughly after each shave and letting it dry fully significantly extends its usable life and prevents skin irritation.
A common mistake is to change the blade only once it is visibly unusable. In fact the sharpness fades gradually, so you get used to the poorer result. Changing at the first signs of tugging or skin irritation gives a closer, gentler shave. A fresh blade needs less pressure and fewer passes — which spares the skin further.
How do I spot a dull blade?
A worn blade shows clearly:
The blade no longer glides cleanly but noticeably pulls at the hair.
Red bumps, burning or ingrown hairs after shaving are a signal.
Visible rust or crusting between the blades means: change at once.
Change interval at a glance
Use sets the rhythm:
| Use | Change |
|---|---|
| Daily, heavy beard | after ~5 shaves |
| Several times a week | after 7–10 shaves |
| Occasional | every 2–4 weeks |
| Rust / tugging | at once |
Care & use longer
This keeps the blade sharp and hygienic longer:
Rinse after every shave — flush out hair and foam under running water.
Let it dry fully — do not leave it in the wet shower, which promotes rust.
Do not wipe on a towel — that bends the fine edge and dulls it.
Store dry — in an airy spot rather than the damp shower caddy.
Common myths
A few myths surround razor blades:
Only with rare use — with daily shaving it is dull after one to two weeks.
No — the sharpness fades gradually; an early change spares the skin.
It is — a rusty blade does not belong on skin, especially with small cuts.
You can noticeably extend a blade's life by patting it dry after rinsing and storing it dry — moisture is the main cause of dullness, not the shaving itself. Some swear by drawing the dried blade backwards across a pair of jeans a few times to realign microscopic burrs on the edge.