1. Material or structure of the chair: The material and structure of the yoga chair may cause friction or noise. If there is abnormal friction or looseness between the parts of the chair, it may produce sound. Check whether the joint of the chair is fastened and ensure that there are no loose or damaged parts.
2. Uneven or unstable ground: If the yoga chair is placed on the uneven or unstable ground during use, it may cause noise. Try to put the yoga chair on a flat and stable ground to reduce shaking and noise.
3. Incorrect use: Yoga chairs may need correct posture and skills. If the posture is used improperly or too hard, it may cause the chair to make a sound. It is suggested to refer to the instructions of the yoga chair or seek the guidance of a professional yoga instructor to ensure the correct use of posture and skills.
If the above methods can't solve the problem, or you think there is a quality problem with the yoga chair, it is recommended to contact the shop or manufacturer who bought the yoga chair, consult their opinions and seek a solution.