What gets sharper the more you use it?

Riddle Explanation:
The riddle, “What gets sharper the more you use it?”, cleverly highlights an unexpected characteristic of a knife. While most objects wear down with frequent use, sharpening a knife during regular maintenance makes it more effective over time. The more attention and proper care you give to a knife, the sharper its edge becomes. This riddle subtly reminds us of the value of maintaining our tools for better performance.