Yes! Your bread machine definitely needs to be cleaned, and as regards how often, it should be cleaned after every use. Immediately after every baking, take out the pan and clean it thoroughly, comb out the crumbs, clean the kneading paddle with a dry sponge or cloth. Avoid using overly damp clothes to clean, or even pouring water directly. And wait for the appliance to cool off after its been unplugged before you clean.