A dull knife is a dangerous knife
Counter-intuitive but true: a sharp knife requires less pressure to cut, giving you control. A dull knife demands force — and when it slips, it slips hard. Most kitchen knife injuries happen not with razor-sharp blades but with blades that have been allowed to go dull.
The other problem with dull knives is that they make cooking worse. Slicing a tomato with a blunt blade crushes and tears rather than cutting. Chopping herbs with a dull chef's knife bruises rather than cuts, releasing bitter compounds into your food. Sharpness is a cooking quality issue, not just a safety one.
Why knives go dull
The dishwasher
This is the single biggest cause of premature edge degradation on good knives. The high heat, alkaline detergent, and blade-on-blade contact in a dishwasher destroy a knife edge. Always handwash and dry your knives immediately.
The wrong cutting surface
Glass and ceramic chopping boards look good and wipe clean easily. They also destroy knife edges on contact. Use a wood or high-density polyethylene (HDPE) board. Your knives will stay sharp dramatically longer.
Improper storage
Knives loose in a drawer knock against other metal, dulling edges between uses. A magnetic wall strip, a knife block, or blade guards solve this entirely.
How to fix a dull knife
- Honing steel (regular maintenance): A honing steel doesn't remove metal — it realigns the edge. Use it before each cooking session. Five strokes per side is enough.
- Whetstone (periodic sharpening): When honing no longer restores the edge, a whetstone is the best way to regrind it. A 1000/6000 grit combination stone covers most home kitchen needs.
- Pull-through sharpener (emergency use): Fast, easy, but aggressive — removes more metal than necessary. Use sparingly.
A good knife, properly maintained, should only need full sharpening on a whetstone once or twice a year. The rest is just regular honing.