Do you know that the rubber of the suction cup in your video has been wiped with stain remover oil? Such a porosity on the surface of the rubber will make the suction cup lose its proper friction. I will know that I saw the writing on the surface of the rubber that has been wiped
Do you know that the rubber of the suction cup in your video has been wiped with stain remover oil? Such a porosity on the surface of the rubber will make the suction cup lose its proper friction. I will know that I saw the writing on the surface of the rubber that has been wiped
At 1:46 of the video