Miele Bagged or bagless Vacuum Cleaner | The cleaning performance of the vacuum cleaner is reduced (Boost CX1).

The airways are blocked.

Something bulky has been vacuumed up (e.g. large leaves from house plants) and is blocking the suction tube. The casing gets very hot as air is unable to escape as required.

Disassemble the floorhead, hose, handle and telescopic tube.

You can carefully push large items which are jammed in the hose or in the telescopic tube towards the floorhead using a long object (e.g. a broom handle).

Items causing a blockage are usually easy to shake out of the handle.

The dust container is full and/or the filters are dirty.

The suction power decreases when the dust container is full or the fine dust filter, filter mat, filter frame and the pre-filter are dirty and/or the exhaust filter is clogged.

Clean the fine dust filter, filter mat, filter frame and the pre-filter as required, but at the latest when you notice a reduction in the suction power.

Clean the fine dust filter and the filter mat once a month and allow a drying time of 24 hours.

Switch the vacuum cleaner off using the On/Off foot switch.

Remove the mains plug from the socket.

Empty the dust container at the latest when the dust has reached the max marking on the dust container.

Empty and clean the dust container:

Unlatch the dust container by lifting the handle upwards (1).
Remove the dust container (2).
The contents of the container can be disposed of with normal household waste, providing they consist of general household dust only.
Hold the dust container close to the bin to prevent dust from billowing out.
Press the release button on the bottom of the dust container.
The flap will open and the dust will fall out.
Clean the dust container using a slightly damp cloth and mild washing-up liquid if necessary.
Dry the dust container thoroughly.
Close the flap, making sure it clicks into place.

Clean the fine dust filter and the filter mat:

The fine dust filter is located on the rear side of the dust container. It is equipped with a filter mat.
Remove the fine dust filter in the direction of the arrow.
Remove the filter mat from the fine dust filter.
Carefully knock the dust out of both filters over a bin.
Take the cleaning tool out of the side flap on the dust container.
Clean the pleated side of the fine dust filter with the long brushes on the cleaning tool.

Risk of damage caused by incorrect cleaning.

The fine dust filter and the filter mat can become damaged. Both filters can lose their effect.

Do not use pointed or sharp-edged objects to clean the fine dust filter and the filter mat.

Do not use washing-up liquid or cleaning brushes when cleaning the pleated side of the fine dust filter and the filter mat with water.

After cleaning, allow the fine dust filter to dry for a minimum of 24 hours with the pleated side facing up. Make sure the room is well ventilated.

After cleaning, also allow the filter mat to dry for a minimum of 24 hours.

Clean the fine dust filter and the filter mat once a month and allow a drying time of 24 hours.

Rinse the pleated side of the fine dust filter under cold running water.
Clean the filter mat under cold running water.
Allow the fine dust filter and the filter mat to dry for a minimum of 24 hours.
Attach the dry filter mat to the dry fine dust filter so that the soft side of the filter mat is pointing up and the loop used to remove it is visible.
Fit the fine dust filter carefully in the dust container.
Press the fine dust filter firmly into position.

In order to continue to achieve the best possible cleaning performance of the vacuum cleaner, replace the CX FSF fine dust filter with a new one after approx. 3 years.

Clean the filter frame and the pre-filter:

There is a removable filter frame on the rear side of the dust container side flap.
Behind the side flap is a pre-filter.
Clean the filter frame and the pre-filter if necessary.
Lift up the dust container handle and hold it in this position (1).
Press the release catch on the side flap. There is a cut-out on the opposite side to make it easier to remove the side flap (2).
Remove the side flap (3).
Once the side flap has been removed, the pre-filter inside can be accessed.
Risk of damage caused by incorrect cleaning.
The pre-filter can become damaged and be less effective as a result.
Do not use pointed or sharp-edged objects to clean the pre-filter.
Clean the pre-filter and the interior side panels using the cleaning tool.
Clean the interior side panels using a slightly damp cloth and mild washing-up liquid if necessary.
Dry the interior side panels carefully.
The filter frame is located on the rear side of the removed side flap at the bottom.
Press the two release catches on the side of the filter frame and remove the filter.
Risk of damage caused by incorrect cleaning.
The filter can become damaged and be less effective as a result.
Do not use pointed or sharp-edged objects to clean the filter.
Clean the filter using the cleaning tool.
Clean the filter frame and the side flap using a slightly damp cloth and mild washing-up liquid if necessary.
Dry the filter frame and the side flap carefully.
Refit the filter at the bottom of the dry filter frame and lock it, making sure it clicks into position.
Carefully fit the dry side flap with the filter frame at the bottom of the dust container (1).
Lift up the dust container handle and hold it in this position (2).
Press the side flap firmly into position (3).
Insert the dry dust container back into the vacuum cleaner at an angle with the handle lifted up (1).
Latch the dust container into place by pushing the handle back down (2).

Replace the exhaust filter if necessary.

Depending on the model, your vacuum cleaner will be fitted as standard with one of the following exhaust filters:
- Hygiene AirClean SF-HY 60 (turquoise): Replace this exhaust filter after approx. 1 year. Make a note of the date on the exhaust filter.
- HEPA AirClean SF-HA 60 (white): Replace this exhaust filter when the timestrip® filter change indicator is completely red. The display will be completely filled with red after approximately 50 operating hours; this corresponds to approximately 1 year of average use. You can continue vacuuming when the light comes on. However, the suction power will be reduced, as will the effectiveness of the filter if it is not replaced in good time.
Press the release button on the exhaust filter compartment flap and remove the flap.
Pull the exhaust filter removal tab upwards and pull the exhaust filter forwards to remove it.
Place the insertion aids that are located on both sides of the new exhaust filter into the guides on the exhaust filter compartment (1).
Push the exhaust filter back and up (2).
Press the exhaust filter firmly into position until it clicks into place (3).
If you have fitted your vacuum cleaner with a HEPA AirClean exhaust filter, press the timestrip® filter change indicator.
After approx. 10–15 seconds, a thin red line will appear in the left-hand side of the display.
Fit the exhaust filter compartment flap carefully in the bottom of the exhaust filter compartment and close the flap, making sure it clicks into position.

Additional information can be found in the linked video.

When using the turbobrush: the turbobrush is blocked.

Switch the vacuum cleaner off using the On/Off foot switch.

Remove the mains plug from the socket.

To remove threads and hairs, place the electrobrush upside down on a level, clean surface.

To guide the scissors, move along the guide track on the roller brush.

Cut any threads or hairs that have wound themselves around the roller brush with a pair of scissors.

Then run the vacuum cleaner to vacuum up the cut threads and hairs.

When using the turbobrush: the turbobrush speed drops.

The turbobrush is driven by the suction flow of the vacuum cleaner. With tightly woven carpets, the speed of the turbobrush can drop because the suction inlet is so tightly enclosed by the carpet pile that the air flow does not circulate. The brushing effect may then not be satisfactory.