The eraser fits comfortably in your hand and its magnet is strong enough for each better, suitable whiteboard. The wiper motor is very good, the fabric should be gereignigt regularly (with me every 2 months), so that it is not glued and therefore more difficult to clean. After cleaning "wins" the Cleaner to wiping force in new condition. For particularly stubborn cases of Additional Services buying a Whiteboard Cleaners is (spray, etc.).
