Updated 19 July 2026 · Written by Sofia Romano
A kitchen knife dulls fast when its edge is abused. The biggest culprits are cutting on glass, stone or ceramic, running knives through the dishwasher, and never honing. Use a wood or plastic board, hand wash and dry your knives, and hone regularly to keep an edge for far longer.
Cut only on wood or plastic, never glass or stone, hand wash and dry your knives, and hone them regularly. Those three habits fix most fast-dulling. Soft steel and poor storage also play a part.
Why Knives Dull Quickly
Cutting on hard surfaces
Glass, stone, ceramic and metal boards roll and blunt a fine edge with every cut. A wood or plastic board is far gentler and keeps an edge for much longer.
The dishwasher
Dishwasher heat, harsh detergent and knives knocking against other items dull and pit edges quickly, and can loosen handles. Always hand wash knives.
Never honing
Honing realigns the edge that bends with normal use. Skip it and the knife feels dull long before it actually needs sharpening. Hone often, sharpen occasionally.
Soft steel or poor storage
Cheaper soft steel loses its edge faster, and storing knives loose in a drawer knocks the edges against other tools. A block, strip or guard protects them.
How to Keep an Edge Longer
- Cut only on wood or plastic boards, never glass, stone or ceramic.
- Hand wash and dry knives immediately instead of using the dishwasher.
- Hone the edge with a steel regularly, before or after use.
- Store knives in a block, on a magnetic strip or in edge guards.
- Sharpen properly a few times a year, more with daily use.
Common Mistakes to Avoid
- Chopping on glass or stone boards.
- Putting knives in the dishwasher.
- Tossing knives loose in a drawer where edges knock together.
When to Consider a Replacement
If a knife will not hold an edge even with a wood board, hand washing and regular honing, the steel may simply be too soft. A better blade is worth it; see our guide to the best chef knives or a complete kitchen knife set.
Frequently Asked Questions
Does cutting on glass dull knives?
Yes, quickly. Glass, stone and ceramic are harder than the blade and roll the edge with every cut. Use a wood or plastic board to protect the edge.
Is honing the same as sharpening?
No. Honing realigns a bent edge and should be done often; sharpening removes metal to create a new edge and is done occasionally. Regular honing keeps a knife feeling sharp between sharpenings.
Does the dishwasher really ruin knives?
Yes. Heat, detergent and knocking against other items dull and pit edges and can loosen handles. Hand washing and drying knives makes them last far longer.
