Bosch BSG7....GB Instructions For Use Manual page 14

Vacuuming
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Hard-floor brush
For vacuuming hard floor coverings (tiles, parquet flooring, etc.)
Push the telescopic tube into the connecting piece of the hard-floor brush
until it engages.
Press on the locking collar and pull out the telescopic tube to disconnect.
Cleaning the hard-floor brush
Vacuum from below to clean the brushes.
If they are very dirty, e.g. with hair wrapped around them, remove both
brush rollers from the hard-floor tool. To do so, lever the rollers out
from the side of the guide using a screwdriver, or similar object.
* Only for model BSG72233GB