Take good care of your kitchen knives, and they will take good care of you. Picture: Stacy Zarin Goldberg for The Washington Post.

Washington - It's hard to make good food without a good knife.

We strongly encourage you to buy a good knife, but if you don't take care of it, the quality and price won't matter.

"You're eventually going to have to sharpen the knife," says Dave Arnold, a former instructor at the late L'Academie de Cuisine culinary school who runs Precision Knife Sharpening out of his home. "It doesn't matter what kind of knife it is."

Here's what you need to know about sharpening and other ways you can ensure your knives will last for years to come.

Understand how a knife works

Most knives are sharpened to an angle of 30 to 40 degrees, Arnold says, and over time and use, "That very thin edge is going to take some damage." The edge will begin to flatten to more of a round shape rather than a sharp, pointy angle. The edge can also bend or fold over - not something you'd be able to see with the naked eye. When you sharpen a knife, you are grinding away some of the metal to reintroduce the proper sharp angle.

Know how to recognise when your knife needs to be sharpened 

The whole point of a sharp knife is to help you work efficiently, easily slicing through food without having to exert too much pressure. Dull knives can also cause accidents when they slip over rather than cut through food. Arnold suggests tomatoes, lemons, bell peppers and carrots as effective foods for testing whether your knife needs to be resharpened. Also, onions. It won't work for everyone since sensitivity to the tear-producing chemical varies, but Arnold says a dull knife is likely to break open more onion cells and release more juices than a sharp knife that creates a clean cut.

READ: 3 time-saving ways to declutter your kitchen

The cool-looking test that involves seeing how well a knife cuts through paper can be a little iffy, too. Even a sharp - but not perfectly sharp - knife might struggle to cut the paper.

Think about honing your knives

Even if you know to sharpen your knives, you may not be as familiar with the concept of honing. Honing does not sharpen the blade. Instead, Arnold says, it realigns the blade, correcting the bending or folding described above. Honing can be done on a steel that looks a bit like a dagger. You'll often find them included in knife sets, but Arnold prefers the quality of steels you buy a la carte.

To hone your blade, lightly run the edge of the knife at a 15- or 20-degree angle along the steel. Three times on each side of the blade should be sufficient, Arnold says. Ideally, you'd be doing this before (or after) every time you use your knife, but we're not idealists here. Let's get practical: Even doing it every so often will help. If honing isn't something you're interested in, you won't necessarily ruin your knife; you'll just need to have it sharpened more often.

Use the right board

Hard surfaces can dull or even chip a knife. Wooden or plastic boards are good choices, Arnold says. And as we've mentioned here before, when it comes to cutting boards, bigger is better.

Clean them properly

Hand-washing is the best way to clean your knives. Dishwashers can be especially hard on knife handles, causing them to discolor, crack or separate from the blade. The racks or utensil basket can damage the blades and vice versa, and fishing a knife out of the dishwasher isn't a recipe for safety, either. After you wash a knife - a sponge with warm water and soap will do - dry it thoroughly, and carefully, with a towel. Do not store it dirty or wet unless you want it to rust.

Store them the right way

Protect the blade, protect yourself. Never should you leave a knife blade exposed in a way that could cause injury. I prefer plastic sheathes on knives so I can keep them in a drawer. Wooden blocks are acceptable, too, as are magnetic strips on the wall, so long as they're not within reach of curious children or in a place where people are prone to bumping into them.