I've looked in the search field and could not find a answer to the question I have. If this is a repeat i apologize and would appreciate being pointed in the right direction. My question is, can I use a bar magnet to remagnatize the magnets in the switch? My dad had some black build up on his magnets and used a pocket knife to scratch it off and I think he demagnatized them some and just wondering if you can remagnatize them or if you just have to buy new ones. Thanks for any help.