I was skeptical when I first bought these to hang solar lights across my fence on the dark side of the house. I thought to myself "there is NO WAY these will hold up through all the seasons," even though I have never been disappointed in any of the Command products I use. Much to my surprise, over a a year later, they have survived torrential rains, snowstorms, very high heat and humidity, and gusting winds. How did you do that, 3M? I simply cleaned the small area of my 6 ft white fence where I was going to place the hooks, and followed the directions. I might add, the light string on my solar lights is a very, very fine wire. I had to put a small piece of tape over it to keep it in place, but that was not a big deal, and well worth it.