I wanted to use these hooks to hang some small holiday wreaths on our glass windows at our house. I cleaned the window surface & my husband applied the hooks as directed. Later that day, my wreaths were on the ground and the hooks were no longer attached to the window. Luckily there was an extra strip I could use for each of my hooks. I personally installed the hook this time following the directions. I waited until the next day to hang my wreaths. I thought it was a success. The wreaths were up for about 2 weeks when they fell again along with the hooks unattached to the window. At this point it is 2 more weeks until it is Christmas. I have no more strips so I either need to buy more or find a different solution. I'm very disappointed this did not work out for me.