1. troubleshoot
When doors and windows are in use, the action should be as light as possible to open and close, do not use too much force, when the doors and windows are opened, if there is an obstacle, the fault should be eliminated first.
2, the cleaning method
Frequently scrub the doors and windows to keep the surface clean and not be polluted or corroded. Try to choose soft gauze or cotton silk when scrubbing to avoid scratching the surface of the doors and windows. When scrubbing doors and windows, it is best to remove the windows, which can be wiped clean and safe.
3, anti-corrosion
Try to avoid acid and alkaline chemicals from contacting the surface of doors and windows. When there are stains and stolen goods, you can clean them with a soft cloth dipped in water or neutral detergent, so as to prevent the doors and windows from being corroded.
4, accessories maintenance
Check all kinds of hardware accessories of doors and windows frequently, repair or replace them in time if they are damaged, and keep the doors and windows open and closed easily and flexibly
