Piano sounds will change over time. Is there any way to maintain yourself?

I can't maintain it myself. If the sound changes, you need to hire a professional tuning lawyer to tune it. If you pay more attention to timbre, tune it twice a year, in May, June and1February respectively. Be careful not to get wet at ordinary times. If you have heating at home, you should pay attention to maintaining a certain humidity indoors. It is ok to put a pot of water in the room or use a humidifier. Never do it yourself,