1. Clean the exterior of the lock with a dry cloth. 2. Use soybean oil, sewing machine oil or sesame oil to drop into the keyhole. At the same time, dip the key in a few drops of oil, insert it into the keyhole and slowly twitch it back and forth several times. It feels smooth, and then turn the key to open it. 3. If there is no oil temporarily, it can be replaced by soap or pencil lead scraps, but the effect is slightly poor. 4. After the lock is opened, a few drops of oil should be added in time to wipe it with a dry cloth for maintenance. If you want insurance, next time you don't want to bother, you should lock it
View full text>