I had better luck piping dehumidifiers versus using the reservoir. Can't remember the brand but bought at Lowe's. First one lasted 5 years in tool room in insulated metal building. That's in the high humidity Houston weather.
As for high powered magnets, their attraction can be dangerous. I hurt my thumb pretty good getting the skin between two neodymium magnets several years back. They were round about the size of a quarter.
