Can You Put Knives in the Dishwasher?

No — don't put good knives in the dishwasher.It's one of the quickest ways to wreck an edge, damage a handle and start rust, and it's the single most common mistake behind a knife that seems to go dull far too fast. The good news: hand-washing a knife takes about ten seconds and saves you money, sharpening and frustration. Here's exactly what the dishwasher does, and what to do instead.

What the dishwasher actually does to a knife

• Knocks the edge against racks and other items.Blades shift and bang into the rack, cutlery basket and dishes throughout the cycle — every contact rolls or chips the thin edge. This alone can dull a knife noticeably in a single wash.
• Harsh detergent is abrasive and corrosive. Dishwasher detergent is far more aggressive than dish soap; it etches and pits steel over time and strips the protective finish, which invites rust spots, especially on higher-carbon Japanese blades.
• Prolonged heat and moisture cause rust and warping. Sitting wet and hot for an hour promotes corrosion, and the heat can loosen or crack wood and composite handles.
• It's dangerous to unload. A sharp blade pointing up in a basket is a cut waiting to happen when you reach in.

"But it says dishwasher-safe"

Some cheap stamped knives are labeled dishwasher-safe, and technically they'll survive — the soft steel won't rust as readily and there's little to lose on a $10 blade. But "survive" isn't "stays sharp." The edge still takes a beating from the racks and detergent, so even a budget knife lasts longer hand-washed. For anything you care about — a forged German knife, any Japanese blade, a knife with a wood handle — ignore the label and wash by hand. It's a big part of why knives go dull so fast.

The ten-second alternative

Hand-washing is genuinely fast: rinse the blade under warm water, wipe it with a soapy sponge from spine to edge (never run your fingers along the edge), rinse, and dry it immediatelywith a towel before putting it away. Drying is the step that matters most — a knife left wet in a rack is a knife starting to rust. Never leave a knife soaking in a sink of soapy water, where you (or someone else) can't see it and reach onto the edge. This routine is the core of knife care and storage.

Store it right after

A clean, dry knife should go somewhere that protects the edge — a magnetic strip, block or in-drawer organizer, not loose in a drawer where it'll knock dull. Hand-wash, dry, store properly, and hone occasionally, and a good knife holds its edge for weeks. Skip those steps — starting with the dishwasher — and you'll be sharpening far more often than you should.