1.Wipe the fittings in time when waterlogging in it in order to avoid rusted hardware fittings.
2.The hinges and drawer slide should be often greased in order to keep smooth when pull and push.
3.The handles and knobs of the kitchen cabinet should have not been hung  anything ,especially something heavy or damp.When the handle and knobs are loose,you can screw the back panel of the kitchen cabinet door with your screwdriver.
4.When the kitchen cabinet door panels are irregular or loose, you should adjust the hinges in the right position.Right now in the market, the hinges are generally three-dimensional adjusted.