Not for the faint walls

Got the Hook bought a bicycle of approximately 12kg weight hang. works great (yes blah, criticism of the supplied dowels and such, but you can just for 2 Euro quality dowels and screws at the hardware store to buy) The problem: I live in a renovated old apartment, where it was very saved during cleaning, the stuff is applied ultrafat but ultra shit. Well, so it is still hanging, also looks chic, but more than 2 months that will not keep me coming more and more of my wall opposite. I find it tends amusing.