I have never had an issue with these hooks before. They have always worked well. Twice now and with different sized hooks, they have just fallen off. I am using the right hooks for the weight of the things I am hanging. I let them sit for 24 hours before hanging anything. The walls are new and clean. I have not cleaned them recently so there should be no residue of anything that keeps them from sticking. It cannot be a temperature problem because it is not overly hot nor overly cold. I am not sure what is causing this issue?
Wouldy