Addition:
A call to Philips provided: a device which although little has been used but is 5 years in my possession, is now excluded from any warranty. That was expectable. The many customer reviews describe the same defect will not let close to a construction defect, but was found in the service workshops that incorrect operation is the cause of the defect. Thus, many customers would like to expect from other electric toothbrushes that want turn brush from the device, rather than subtract. By a rotational movement would result in a defective device.
I can say I have not rotated because I've never used another electric toothbrush because only. It seems to be so that the normal mechanical stresses during tooth brushing sufficient to destroy the device.
Addition:
After the unit has now failed completely, I sawed to the cause of the evil it to get to the bottom. A simple screw that connects the head with the motor gear had come loose. The screw was not hedged, no sapwood, no lock nut, no snap ring, no marks, nothing. One can assume that by the vibrations it is a matter of time when the screw is loosened. Thus, the statement of the technical service of Philips that the defect is attributable to incorrect operation, incorrect.
The many used equipment offered as defective for sale on the Internet, confirmed my guess. Buying a defective device is not worth because you have to saw open the device capsule to get to the defect. Unless you are happy with a tape between control button and the recording pen.
