Looking at the front of the machine there is a 'kicking plate' at the bottom. Prize this off carefully with a screwdriver from the top, it then unclips. On the bottom right there is a Black circular plug. Turn anti-clockwise, take off and look inside for small change and debris. Hint: Have a towel ready to mop up - just in case. I placed a baking tray underneath first to catch the water Approx a cup full in mine.
You may need to reset afterwards.
Hope this helps.
Simon
March 2006