Cleaning your coffee maker:

Instructions:

1. Empty the carafe: Empty and rinse the carafe and dump out any coffee grounds left in the filter.
2. Make a solution of water and vinegar: Fill the water chamber to its full capacity with equal parts white vinegar and water. I used the carafe to measure equal parts of each.
3. Run a half brew cycle: Start a brew cycle. Midway through the brew cycle, turn off the coffee maker and let it sit for an hour.
4. Finish the brew cycle: After an hour, turn on the coffee maker and let the brew cycle finish.
5. Before discarding the vinegar-water solution use it to clean the coffee pot (carafe)
6. Run a fresh water cycle: After the brew cycle has completed, pour out the vinegar-water solution and fill the water chamber with fresh water (no vinegar). Run a whole new brew cycle just with the water.
7. Repeat two more times, allowing your coffee maker to cool slightly between brews.
8. Wipe down your coffee maker: Wipe down the exterior of your coffee maker, and wash the carafe and filter basket in hot, soapy water if necessary.
9. Reassemble: Reassemble and brew a great cup of coffee!

source: thkitchn.com

see also: 8 Things You Didn’t Know About Decaf Coffee