When installing, Please wipe the adsorption surface clean first. 2. When the suction cup is easy to slide, a small amount of salad oil can be coated on the inside of the suction cup, so that the suction cup is not easy to slide. 3. When the suction cup becomes difficult to absorb after being used for a long time, please put the suction cup into a container containing about 60 degrees hot water and soak it for 5-6 minutes before drying/drying it before using it. 4. When there is oil stain and wax on the adhesive surface, Please wipe it with organic solvent and then stick it. 5. Please do not hang valuables such as clocks, cameras, mirrors on hooks. 6. Do not use uneven and rough surfaces. 7. Please do not use similar recommendations in places such as water droplets, water splashes, electric furnaces, stoves, etc.