I bought 3 packs of these to put up my icicle Christmas lights and they were a huge disappointment! I followed the recommendations and was careful to wipe down the surfaces before placing the strips and holders on the house, but in different areas the adhesives were just not sticking. It was very frustrating to get the lights up and in place only to come out and find sections of them had fallen! I even tried using two adhesives to each holder and that didn't work either. I was trying not to put nails into the eves of the house, but ended up having to do just that.