What kind of glue did you use? I have used the E6000 glue in many different crafting applications, and it does not fail in my experience. It has a very strong odor, and I try to wear a mask when using it, or use it in a well-ventilated area. I definitely wouldn’t recommend hot glue, as that can eventually peel right off. I think the key to this working is definitely a heavy duty industrial strength adhesive. I’ve had friends that say “Goop” glue works well too. Hope this helps!