Simple solution is to glue a large steel washer to the fan making sure it's balanced. Then just put the magnets on the washer WITHOUT glue. Easily adjustable and they will stay put without glue. Mine works fine like this.
Dan
Be it known! If I can hear you eat your lunch because you chew with your mouth open I have fantasized your final moments on this earth!
Rude and disgusting! And if you tell me it's considered a compliment in some cultures I will invite you to relocate.