These odors are a result of food debris building up in your disposal. Over time spoiled food and bacteria accumulate. A great way to eliminate this smell is to use a lemon or orange. Cut the lemon or orange up into small sections and put it into your disposal, run for about 30 seconds. Next, try squirting a little liquid dish detergent into the disposer while it’s running. Last, run cold water for about 30 seconds to rinse everything down the drain. Another quick tip is to always run cold water when grinding items in your garbage disposal.