I had a cloudy red/clear lamp from 1987. I thought I would try an experiment. I dumped the liquid and added distilled water, detergent for a surfactant and sugar instead of salt. After 4 tsp of sugar the lava still won't dome. Has anybody tried either sugar or salt with vintage lava? Either the vintage lava is denser than sugar water or I have yet to add enough. Seems like more than enough sugar water has been added already if it is ever going to dome. I was trying sugar since it made sense to me that salt would have a tendency to rust the coil over time. Would my problems go away if I dump the liquid and just use salt instead? One very cool effect of the sugar water is that it makes the globe look like a magnifying glass. I bet if I could get it to work with sugar the lava would move through the globe like it's in a funhouse mirror. Any ideas?