Knife care is the routine of washing, drying, storing, honing, and occasionally oiling a knife so it stays sharp, rust free, and safe to use for decades. This guide covers how to take care of knives day to day, the maintenance jobs that come around less often, and the handful of mistakes that quietly ruin good steel.
I have spent years handling kitchen and folding knives at Steel Snob, and most of the blades I see damaged were not worn out by cutting. They were worn out by a dishwasher, a glass cutting board, or a wet drawer. None of the routines below take more than a minute, and together they are the difference between a knife you replace every few years and one you hand down.
Washing and drying: never the dishwasher
Wash a knife by hand, right after you use it, with warm water and a drop of dish soap. Wipe the blade from spine to edge with a sponge or cloth, never across the edge, and rinse. The whole job takes fifteen seconds and it keeps acids, salt, and food residue from sitting on the steel.
Do not put a good knife in the dishwasher. It is the single fastest way to wreck one, and here is why:
- The high heat and long soak strip protective oils and can crack or swell wooden handles.
- Dishwasher detergents are harsh and abrasive, and they corrode and dull the edge over a few cycles.
- Blades knock against racks, other cutlery, and pots, chipping the edge and rolling the tip.
- The prolonged wet cycle promotes rust and staining, especially on carbon steel and at the bolster.
Drying matters as much as washing. Dry the blade completely with a towel the moment it comes out of the water, then let it sit out a minute before you put it away. Water left standing on steel, especially where the blade meets the handle, is what starts most rust. A knife that goes into storage even slightly damp is a knife you are slowly corroding.
Storage: keep the edge off other steel
Loose in a drawer is the worst place a knife can live. The edge bangs against every other utensil, the tip snaps, and you cut yourself reaching in. Any of the options below beats a bare drawer.
Knife block
A block keeps blades separated and the edges protected. Store knives edge up or on their spine where the slot allows, so the cutting edge is not dragging against wood every time you pull a knife out. Keep the block clean and dry inside, and never sheath a wet knife in it.
Magnetic strip
A wall mounted magnetic strip keeps knives visible, off the counter, and away from each other. Place the spine on the magnet first, then roll the blade flat onto it, rather than slapping the edge down. To remove, roll it off the same way. A wood faced strip is gentler on the blade than a bare metal one.
Sheaths and edge guards
For knives kept in a drawer or a bag, a sheath or a plastic edge guard covers the cutting edge so it cannot contact anything hard. This is the right call for a chef knife that travels or a folding knife carried in a pack. Make sure both blade and guard are dry before you cover them, because a covered wet blade traps moisture and rusts faster, not slower.
Honing versus sharpening: two different jobs
People use these words interchangeably and they are not the same thing. Honing realigns an edge that has rolled slightly out of true; it removes almost no metal. Sharpening grinds a fresh edge and removes metal. You hone often and sharpen rarely.
- Honing: Run the blade along a honing steel or ceramic rod every few uses, or before a big prep session. It takes a few seconds and keeps a keen edge feeling keen. It does not fix a truly dull knife.
- Sharpening: When honing no longer brings the edge back and the knife struggles to bite into a tomato skin, it is time to sharpen. For most home cooks that is a few times a year; for heavy daily use, more often.
If you are not sure which your knife needs, the tomato or paper test tells you: a honed edge glides through both, a dull one tears. When it is time to actually restore the edge, our guide on how to sharpen a knife walks through whetstones and pull through systems step by step, and if you would rather buy a tool than freehand it, we compare the options in our roundup of the top 3 best kitchen knife sharpeners.
Rust prevention: know your steel
How much you fuss over rust depends entirely on what your knife is made of. The two families behave very differently.
Carbon steel versus stainless
Carbon steel takes a keener edge and is easier to sharpen, but it will rust and stain if you leave it wet or let acidic food sit on it. It needs to be washed, dried immediately, and oiled to stay healthy. Stainless steel resists rust because of its chromium content, so it is far more forgiving, though “stainless” means stain resistant, not stain proof. Neither one survives being left wet in a sink.
Patina is not rust
On carbon steel you will see a grey or blue tint develop over time. That is patina, a thin layer of oxidation that forms as the steel reacts to food and air, and it actually protects the blade underneath from deeper corrosion. Patina is stable and grey to dark; rust is orange, flaky, and spreads. Leave a patina alone. If real orange rust appears, scrub it off gently with a paste of baking soda and water or a wine cork, then dry and oil the spot.
Oiling the blade
Carbon steel blades benefit from a thin coat of food safe mineral oil, camellia oil, or a similar neutral oil, wiped on with a cloth after the knife is clean and dry. This is essential for carbon steel that will sit unused for a while, and a good idea before long storage for any high carbon blade. Stainless generally does not need oiling, though a wipe before long term storage does no harm.
Cutting boards: what dulls an edge and what does not
The surface you cut on does more damage to your edge than the cutting itself. Every chop drives the edge into the board, and a hard board pushes back against the fine tip of the steel.
- Best: End grain wood boards. The fibers stand up like a butcher block and part around the edge, then close back, which is gentle on steel and self healing.
- Good: Edge grain wood, bamboo (a touch harder than most wood but fine), and softer plastic or polypropylene boards. Plastic is easy to sanitize; replace it once it is deeply scored.
- Avoid: Glass, granite, marble, stone, and ceramic boards. They look clean and modern and they will dull or chip a knife faster than almost anything else, because the edge has nowhere to go when it meets a surface harder than the steel.
If you own good knives, a decent wood board is one of the cheapest ways to protect them. A quality edge on a glass board is wasted within a week. This applies double to premium blades; see our reviews of the best chef knives and the harder, thinner steel in our guide to the best Japanese knives, which are especially unforgiving on a hard surface.
Handle care: oil wood, keep it dry
Wooden handles need the same respect as a wooden board. Do not soak them, do not run them through the dishwasher, and dry them after washing. Over months of use a wood handle dries out and can crack or loosen at the tang.
A few times a year, wipe a wooden handle with a food safe mineral oil or a board conditioner, let it soak in, and buff off the excess. That keeps the wood sealed against moisture and looking good. Synthetic handles (G10, Micarta, polymer) need nothing beyond a wash and dry, though the pins and bolster on any knife still benefit from staying dry.
Folding knife maintenance: the pivot and the lube
A folding knife has one part a kitchen knife does not: a pivot, plus the pocket lint, dust, and grit that collect around it. If your folder is getting gritty to open or the action feels sticky, it needs cleaning, not force.
- Flush the pivot and blade well with warm water or an isopropyl alcohol rinse to clear out lint and grit. A soft brush or compressed air helps reach the channel.
- Dry it completely. Work the blade open and closed a few times to shed trapped water.
- Apply a single drop of a light knife lubricant to the pivot, work the blade a dozen times to spread it, and wipe away any excess so it does not attract more dirt.
- Check the pivot screw tension. Snug is right: too loose and the blade wobbles, too tight and it binds. Adjust in small turns.
Keep the blade itself clean and dry like any other, and hit the edge with a hone as needed. A folder that gets a rinse and a drop of oil every so often will open like new for years.
Dos and donts of knife care
| Do | Dont |
|---|---|
| Hand wash and dry immediately after use | Put a knife in the dishwasher |
| Store in a block, on a magnetic strip, or in a guard | Toss knives loose in a drawer |
| Cut on end grain wood or soft plastic | Cut on glass, stone, granite, or ceramic |
| Hone every few uses, sharpen a few times a year | Wait until the knife is fully dull to do anything |
| Oil carbon blades and wood handles periodically | Leave a blade wet or store it damp |
| Flush and lube a folding knife pivot when gritty | Force a sticky folder open or over tighten the pivot |
Frequently asked questions
Can I put my knives in the dishwasher?
No. The heat, harsh detergent, long soak, and knocking against the rack dull the edge, corrode the steel, and can crack wooden handles. Hand wash with warm soapy water and dry the blade right away instead. It takes fifteen seconds and it is the most important habit in knife care.
How should I store my knives?
Anything that keeps the edge from contacting other metal: a knife block, a wall mounted magnetic strip, or a sheath or edge guard for drawer and travel storage. Never store knives loose in a drawer, and never put a knife away wet. Dry the blade first, then store it.
How do I prevent my knives from rusting?
Dry every blade immediately after washing, never leave one sitting wet, and store it dry. Carbon steel needs a thin wipe of food safe mineral or camellia oil, especially before long storage. Stainless resists rust on its own but is not immune, so it still needs to be dried. If orange rust appears, scrub it off gently with a baking soda paste, then dry and oil the spot.
What is the best cutting board for my knives?
An end grain wood board is the gentlest on an edge, with edge grain wood, bamboo, and soft plastic close behind. Avoid glass, stone, granite, marble, and ceramic, which are harder than the steel and dull or chip the edge quickly. A good board is one of the cheapest ways to protect a good knife.
How often should I oil my knives?
Oil a carbon steel blade whenever it will sit unused for a while, and give any high carbon blade a wipe before long storage; stainless generally does not need it. Oil wooden handles a few times a year, or whenever the wood starts to look dry. Always oil a clean, fully dry surface and buff off the excess.
What is the difference between honing and sharpening?
Honing realigns an edge that has rolled slightly and removes almost no metal, so you do it often, every few uses, with a steel or ceramic rod. Sharpening grinds a new edge and removes metal, so you do it rarely, a few times a year for most people, once honing no longer brings the edge back.