1. The density board for Sophia's backboard is not waterproof. Close the windows in rainy season to prevent the floating rain from wetting the density board. At the same time, we should pay attention to indoor ventilation, exhaust indoor moisture and maintain the normal indoor temperature, which is also conducive to prolonging the life of MDF.

2. The surface of the density board used for Sophia backboard must be wiped with a clean soft cloth, and it is best to regularly apply special furniture wax for maintenance, once a month.