So I suppose the theory is that the rice will draw the water from the blade. But why bother? Why would you need to put it in rice to dry it properly? It sounds like overkill to me and more likely to result in damage to the blade edge. If you are living in a humid climate and are worried about the humidity rusting the blade a water dispersant would seem to be a better idea for a razor. A product such as WD-40 or Tuf Glide for example. Both of those are fluids so no chance to damage the blade.