2 of 2 people found the following review helpful
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This review is from: Philips Sonicare HX7006/80 Elite Brush Head Pack of 6 (Personal Care)
The brush heads are leaking in to the base unit and only after a few uses, the water drops that get down there eventually start smelling and not very pleasant. This never used to happen with the more expensive type of brush but assume Philips Sonicare have cut corners with this model.