I've only cleaned my US ellipsoids....not sure how different they are in construction. The reflector wasnt really dirty so I just swished some water around on it. Worked fine. I found that using pliers to remove the tamper proof screws to open the unit up worked quite well. Just get a good grip on the top of the screw and twist. I also seperated the chrome reflector part from the glass ellipsoid to get more space for cleaning the glass. Paper towel and windex worked fine. It really was worth it.