Hi! Can anybody help me? I just bought a 1973 Aristocrat gold base/cap yellow/red and at the bottom around and on the coil it has white powder looking substance. The lamp still flows but, I am concerned what the white powder stuff is - maybe it is oxidation? The lamp is also alittle cloudy and I would like to know how I could clear that up as well. If the older lamps are cloudy is there any way of clearing them up? I thought maybe I could change the liquid and leave the lava but, I have no clue if it's a screw on cap or how to even go about the process. Any help anybody could provide would be great!