Review on Revolutionary Large Plate Hanger Set - Invisible English Disc Adhesive (4-4 Inch Hangers) by Kyle Mack

I followed each step carefully, rubbed alcohol on my vintage plates and artwork, used the correct size slices on the right plate, let them dry for at least 24 hours, and even moved them around to ensure a good connection. But what do I wake up to at 4am the next morning after hanging my vintage plate on the wall but it was a broken mess! One plate fell, knocked over another and smashed both, one of which is truly irreplaceable! Now I'm scared of more falls and can just take them all off for fear of losing more. When they can't do exactly what they're supposed to do after painstakingly following the correct instructions for use, you can also use command bars. OH! And they DO NOT WORK AT ALL on metal. Found out the next morning when all the washers were removed from the metal plates/cymbals and the fine print said it wasn't recommended for metal (*No other review mentioned this before buying so thought it was worth asking) . I'm so sad.