It is easy to clean a coffee maker. Try following these steps below :

1. Please take out the coffee maker filter
2. Mix water and table spoon of vinegar (a mixture of 1 part vinegar to 2 parts water) and pour into the coffee maker
3. Turn off the coffee maker.
4. If the mixture has run completely through, let it cool 15 minutes
5. Rinse out any vestiges of vinegar by brewing water only through the coffee maker twice more
6. Turn of again and let it cool about 15 minutes.
7. Wash the carafe and filter basket in soapy water