1. Rust on the strings can cause damage to our fingers. Pressing chords or sliding hooks can damage our fingers, and some may even cause bleeding from hand scratches.
2. The impact on timbre: After the strings rust and oxidize, the timbre will become dull, and playing a piece of music will not achieve the desired timbre. In the long run, it will affect the interest in learning the piano.
3. Damage to the string, rusted and oxidized strings will accelerate the wear and tear of the string during playing.