Bosch TKA 9110 UC Use And Care Manual page 10

How to take care of your thermal carafe
10
1. The vacuum lining of the carafe is made of glass,
so avoid any extreme changes of temperature,
i.e. from very cold to hot or vice versa.
2. If you rinse out the thermal carafe with hot water
before you place it on the coffeemaker, your cups
of coffee will be hotter.
3. If the thermal carafe no longer seals properly, tigh
ten the base by turning it clockwise slightly.
The glass lining of the carafe has been manufactured
by hand which can give rise to streaks on its surface.
These have no effect on its operation.
CAUTION
Broken glass is not covered by the warranty.