Buelkmag Magnetic Hooks for Cruise Cabins, Black 150Lb Magnetic Wreath Hanger, Locker Accessories, Strong Magnetic Hooks for Classroom, Whiteboard, Grill, Cruise Ship, Garage, Hanging - 3Pcs

Does the wall have a bit of texture? That will keep it from getting a good grip. Next time, look at magnetic pegs instead of hooks on Amazon. They are heavier to travel with, but hold a lot more weight than the little hooks.