Article in English: Popular standard degreasers like WD-40 aren't the best option for a garage door. Instead, purchase a lithium-based grease at a hardware store or online. There are also certain greases that are made specifically for garage doors. Do not use oil.  Garage door grease will typically come in an aerosol or spray can. Oil is susceptible to dirt and dust buildup and is more likely to drip than garage door grease or lube. Read the label to make sure that the grease that you are using is appropriate for your doors. Slowly lift your garage door up manually and spray each hinge as it meets the bend of the track. This will lubricate the moving parts on the door and will make opening and closing the garage door much smoother. Use one or two sprays on each hinge. Your hinges should be covered in lubricant. The rollers are the circular moving pieces on your garage door and are attached to each of your hinges. Inside of these rollers are small ball bearings that need to be lubricated for your door to open and close smoothly. Use the thin hose attachment to spray the grease inside of the rollers. Wipe out any excess lubricant so your door doesn't become unbalanced.  Any exposed ball bearings must be thoroughly lubricated. Don't spray any lubricant on nylon rollers. The springs can usually be found at the top of the garage door and must be fully lubricated as well. The bearing plates are the moving circular parts on both sides of the springs. Spray down the outside of the springs and near the center of the bearing plates, then open and close your garage door to spread the grease around.  You will most likely need a step ladder to reach the springs and bearing plates. If your springs are making noises, you need to grease your springs. If your springs are damaged or bent, have them replaced before moving on. Lubricating the lock will make locking your garage door easier, and can prevent rust in the long run. Point the lubricant towards the lock's keyhole and spray it once to lubricate it. Once you're done lubricating the lock,...

Summary in Chinese:
买一瓶锂基润滑脂或车库门润滑油。 打开车库门，然后在每个铰链上都喷上润滑油。 润滑滚轮。 在弹簧和轴承板上也喷上润滑油。 给锁和臂架喷上润滑油。 给轨道顶部喷上润滑油。