Like most gadgets, can openers require regular maintenance to last. For example, some electric models require regular blade replacements. Inner workings must be cleaned often to prevent food or rust buildup. Gears also dull over time and may break with continued extensive use.

Can can openers go dull?

When the can opener's blade goes dull it can be annoying. ... If the can opener blade still seems dull, tear off a long strip of aluminum foil and fold it in half to double the thickness. Run the aluminum foil carefully over the can opener's blade to sharpen it.

How do you sharpen a handheld can opener?

You can sharpen can openers very easily by running sand paper through them. Get a good coarse grade and run it through the can opener several times and it will come out like new. I do this with my can openers (hand held and electric), scissors and even my hole punches!