Product review (3 stars): might work- if you remember to use it
My family is always asking " are these dirty or clean"?  The concept of this magnet is a good one:  Slide to the dirty side when dirty and the clean side when clean.  Honestly, it is simple enough, right?  Well, for some reason we can't seem to remember to slide the magnet to the correct side, therefore, making this product useless.  So personally, it didn't work for me but if you think you would be diligent about sliding the magnet to the correct side then go ahead and give it a try.