Turn the lights on! Don't do it in the dark! Not really making fun, but I used to work in pharmaceuticals where certain things had to be packed/worked with under clean conditions with special HVAC concerns and people specially suited. Guess what? There's still dust floating around, like it or not. A highkly skilled watchmaker once asked me why he had dust in watches that had been air-tight sealed for decades. There is an answer.... Clean your camera and don't worry about the dust that you see with the 'torch'.