Here is what not to put in your garbage disposal: * Don’t pour grease, oil or fat onto the disposal *Don’t use hot water when grinding food waste; only cold *Don’t grind fibrous material such as corn husks, celery and vegetable skins *Don’t put large amounts of food scraps into the disposal all at one time, feed small amounts in slowly while running cold water before, during and after *Don’t put expandable food in the disposal such as rice, coconut or pasta *Don’t grind bones and skin *Don’t put coffee grounds in the disposal. De Hart Plumbing, Heating and Cooling serving Manhattan Kansas, Junction City Kansas, Wamego Kansas and some outlying areas.