On August 2, Bill Bradford wrote: I had to use alcohol to dissolve the goo that 30-year-old insulative foam turns into when touched. You likely won't need that for Qbus stuff. For the first step I would suggest compressed air. Then use a clean paint brush (I have one that I keep around just for dusting things off). On the metal and plastic surfaces I tend to use glass cleaner. Some people look at me funny when I do that, but it works very well. -Dave -- Dave McGuire Laurel, MD