Bosch TWK 911 UC - Manual (Page 7)

7
When and how to descale
Descale the carafe regularly, at the latest when
- the time required to boil water becomes longer
- deposits can be seen
- the appliance becomes noisier.
q The carafe can be descaled with vinegar (see
section on "How to clean the kettle") or by using
a descaler.
q Add descaler in accordance with its manufacturĆ
er's instructions and fill the carafe with water.
The procedure for the actual descaling is as
follows.
1. Leave the solution to stand for the recommended
amount of time.
2. Under no circumstances allow the solution to
boil. This could damage the appliance.
3. Rinse the carafe, filter and lid at least twice with
clear water.