Yes, you can clean a coffee maker with Dawn dish soap. Fill the carafe with warm water and a few drops of Dawn dish soap. Pour the soapy water into the reservoir and run the coffee maker as if you were making a pot of coffee. Discard the soapy water and rinse out the carafe. Refill the reservoir with fresh water and run the coffee maker again to rinse out any residue. Discard the water and your coffee maker should now be clean.