Cleaning a thermos jug
To maintain an excellent coffee taste, it is important to regularly clean the jug.
Put a dishwasher tablet, or dishwashing liquid in the jug, fill it with
hot or cooking water, stir with a wooden spoon then let it sit for an hour.
After cleaning, empty the jug, clean with a brush, and rinse at least two times with water, before using the jug again.