Static charge.
Spray the floorhead and the casing with an antistatic spray that is suitable for use on the vacuum cleaner surface.
A metal strip has been incorporated into the underside of the handle of some Miele vacuum cleaner models to discharge static charge.
Not all vacuum cleaner models feature this metal strip. Models which do not feature a metal strip in the handle are not faulty. The metal strip cannot be retrofitted.
If your vacuum cleaner model has a metal strip on the underside of its handle, have an expert check if the metal strip is coming into contact with the tube.
Please make sure that you keep your hand in constant contact with this metal strip during vacuuming.