About 10 years.
The crystal buds absorb moisture and dissipate heat during the drying process, and can be used again after being heated during the next washing process. However, the life of the crystal buds is limited, and they need to be replaced by after-sales service in about 10 years.
Jingle stone is a patent of Siemens and is a physical drying mode. The advantages are good drying effect and good ductility.