Switch the robot vacuum cleaner off. The switch is located on the side of the robot vacuum cleaner. Depending on the model, set the I/0 switch to switch position 0 or the ON/OFF switch to switch position OFF.
Cleaning the RX2 and RX3 roller brush:
Clean the roller brush as required. This will require the cleaning tool which is located at the top of the dust box lid.
Place the robot vacuum cleaner upside down on a level, clean surface.

Using both hands, take hold of 2 opposite elastic corner brush holders and pull them upward to remove them.

Unlatch and remove the roller brush cover.

Remove the roller brush.

Pull the bearing cover sideways off the roller brush and remove any threads or hairs that have wound themselves around the bearing.
Reinstall the bearing cover, making sure it clicks into position.

Use a pair of scissors to cut any threads or hairs that have wound themselves around the roller brush.

Remove the threads and hair using the wiper which is located on the bottom of the cleaning tool.
Hold the wiper over a garbage can.

Press the button at the top of the wiper several times until all threads and hair have fallen out.

Reinstall the roller brush with the bearing cover attached. Make sure that the side with the pointed end is inserted into the corresponding slot.

Carefully reinstall the roller brush cover on both sides, making sure it clicks into position.

Press the two corner brushes carefully onto their pins until they audibly engage. Take care to comply with the markings L and R.
Cleaning the RX1 roller brush:
Remove the dust box and place the robot vacuum cleaner upside down on a level, clean surface.

Remove the roller brush cover.

Remove the roller brush.
Take care not to lose the square guide.

Use a pair of scissors to cut any threads or hairs that have wound themselves around the roller brush. To guide the scissors, move along the guide track in the roller.

Remove the threads and hairs with the comb end of the cleaning brush.

Reinsert the roller brush.
Make sure you position the roller brush carefully and that the square guide is attached.

Lock the cover, making sure it clicks into position.
Reinsert the dust box in the robot vacuum cleaner, making sure it clicks into position.