Seems silly that the suction cup doesn't work, but it just doesn't work. I tried it on several flat hard surfaces and each time they lost suction. It usually lasts 2 to 5 minutes and then just falls off. I rinsed them off with water in case there was anything left on them. I've tried bone dry and with some moisture. None of the attempts worked. I suspect it's the material the cups are made of that doesn't absorb very well initially.
MHDMAG Magnetic Hooks 80LBS Magnet Hooks With Neodymium Rare Earth Magnet For BBQ, Hanging, Holder,Keys, Storage, Door, Office, Grill, Cruise Ship Accessories, Black,Pack Of 5
36 Review
Mavoro Strong Magnetic Hooks For Hanging. Up To 65 Lbs. Set Of 2 Black Magnet Hooks Heavy Duty Magnets, Neodymium 52 Rare Earth Magnets. Rotating Swivel Style Magnet Hook For Refrigerator, Locker Etc
35 Review
MHDMAG Heavy Duty Neodymium Magnetic Coat Hooks, Rare Earth Magnet Hangers For Home, Office, Workplace Or Traveling. Pack Of 2 In Black.
28 Review
25Lbs Heavy Duty Neodymium Magnetic Hooks, 15Pcs Cruise Essentials Hanging Magnets For Refrigerator, Kitchen, Home & Workplace By MIKEDE
31 Review