I bought a Stainless Steel soap bar and it works, it just does. It was from China and hollow inside and I would like to know if that's either a cost cutting measure or how the bar works? What would happen if it were solid? Another thing would be if it had a magnetic core, or made from a metal that reacted to magnets a lot more so than Stainless Steel already is. How would this affect the perceived working of the device please?