A guzheng is a wooden instrument with a thin soundboard, so changes in the environment show up directly in the sound. Tuning drift, dullness and even cracks are usually not a quality defect but the result of humidity and daily habits over time. Care needs no special tools — getting these four things right is enough.
1. Humidity: 40–60% is the comfort zone. Too dry (a heated room in winter) and the soundboard shrinks and cracks; too damp (the rainy season) and the voice dulls while bridges slide. A hygrometer helps. If you have none, remember two moves: keep the instrument away from radiators and air-conditioning outlets in winter, and use a dehumidifier or desiccant in the damp season. When not playing for a long period, put it back in its case. Never leave it against a sunny window — UV ages lacquer and timber together.
2. Cleaning: dry cloth and soft brush, never a wet cloth. The soundboard faces up, and dust settles between the bridges where it is hard to reach. Brush along the grain with a soft brush, then wipe lightly with a dry cloth. Do not wipe the soundboard with a damp cloth — absorbed moisture dulls the voice — and do not use wax or furniture polish, which makes bridges slip. Wipe hand moisture off the strings with a dry cloth to slow corrosion.
3. Tuning: small adjustments, repeated. A new instrument drifts more in its first three months, so check monthly; once settled, tune quarterly. Work from the low strings to the high, turning each peg only a little and going around two or three times so tension settles. Do not force a string to pitch in one turn, and avoid frequent large adjustments — they raise the risk of breakage. A tuner is enough; there is nothing to gain from chasing anything beyond standard pitch.
4. String changes: one at a time. When a string breaks, release its tension fully and replace it individually. Do not slacken every string at once for convenience — releasing all tension suddenly makes the body readjust and drift longer. New strings stretch for a while, so some drift is normal; avoid heavy tuning until they settle.
Quick troubleshooting: a buzz usually means a bridge has moved or a string is touching a bridge edge; a note that stays flat may be an aged string or a misplaced bridge; a small dent in the soundboard should not be filled with chemical glue — see our separate note on handling soundboard dents. When unsure, send the factory a photo rather than improvising.
If your instrument has not been checked or tuned for a long time, send us the model, age and your region and we will suggest care suited to your local climate.