Anybody have any recommendations on what to use to clean our ellipsoidals? They're mostly Altman 360Qs and CCT Shillouette Zooms, but most of them haven't been cleaned in at least 4 years, and possibly in the lifetime of the fixture. We also have several Zoom spots and incandesent ellipsoidals that are just sitting up in the catwalk, and haven't been used in years. Are they likely to be any good? I've seen some theaters using incandescant ellipsoidals similar to ours, but when I hung one and turned in on, it looked absolutely pitiful compared to the rest of the stage lighting. I'm assuming that we should take them apart and clean the lenses and reflectors, but if that's not the best idea, let me know. And cheap is good. How often do you think cleaning in necessary? How about tuning/bench focusing? Also, in a related question, what exactly is a zoom spot? Is it some kind of precursor to the Ellipsoidal Reflector Spot?