A few signs your knife needs sharpening:
It slips or slides when cutting tomato skin or delicate ingredients.
You need to apply more force than usual to slice.
The blade feels like it's crushing rather than cleanly slicing.
Paper test: if it can’t slice cleanly through a sheet of paper, it’s time to sharpen.
Regular use will naturally dull the edge over time, even with high-quality Japanese steel.
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