How do you maintain the blades of your lawn mower?
Clean
After mowing, grass will end up in the mower deck and on the blades of the lawn mower. Shreds of grass stick together and to other materials, especially when they're wet. That's why it's important to remove the grass from the mower deck of your lawn mower. Use a brush with rigid bristles for this. This also improves the lifespan of your blades.
Sharpen lawn mower blade
Are you experienced and do you want to sharpen the blades of your lawn mower yourself? You'll need a angle grinder, iron file, or multitool. Scrape the blade across the tool. Do you have a rotary mower? You have to make sure you keep the blade balanced. If one side of the blade is heavier than the other, the blade will vibrate and wear your motor faster. When you're not sure, have it done by an expert.
Replace lawn mower blade
If the blade of your lawn mower is rusty, damaged beyond repair, or worn down, you have to replace it with a new one. Make sure you choose the right mower blade for your lawn mower. Not every type fits on every lawn mower.