Empty Water Light?

My Dryer Works for a short period of time and then the Empty Water Light comes on and the heater stops working. There is no water in the water container, the filters are clear and there is plenty of air ciculation. If I remove the Condesor,clear the slight build up and replace it,it will work for a short period of time,and then goes off.I understand this could be a build up of fluff in the water reservoir, any ideas how to clear this?
MY MODEL IS THE CREDA T622CW