If you're like most people I'm sure that you have found that your garbage disposal gets a little stinky after a while. To reduce these odors pour about a cup of ice in your disposal and place an upside down plate over the opening to prevent a piece of ice from flying out. Turn it on and the ice will scrub the inside of the disposal. No the ice will not "dull" the blades. There are no blades in a disposal just blunt slingers. Have a Great Week!