I have the Gryphon Studio Grinder (not the Gryphette) where it has a litte water/cooling tower. I think my tower is defective, but I can't find any pictures of the tower without a sponge in front of it online. Is there supposed to be a hole by the sponge holder? Mine does not have any type of hole or opening to let the water drip out onto the sponge. None of the pictures online show the sponge dipping into the tank, so I'm assuming there is supposed to be an opening, which is something my tank doesn't have. Does anyone else have one of these? What is your tank like? If yours doesn't have an opening, how do you keep your sponge continuously wet?