I don't have one of these, so I'm talking through my hat, but I worry about this: is it ever a good idea to use pressurized air to blow into a cavity on an opto-electronic device, unless you know that any dust will exit only through the cavity opening and not be blown further inside the device? On Fri, Apr 23, 2010 at 4:47 AM, Vladimir Gajic <vgajic67@xxxxxxxxxxxxxx> wrote: > Hi Ernst, > > I did allready. Usually I use pressurized air for cleaning the cone. It's > the best method, one just have to pay attention on the spraying angle witch > have to be small enough not to damage the plate. > > Regards > Vladimir