I have very little dust in my basement darkroom even though I do some woodworking in the basement. I think there are two things that make a big difference. I have a heavy duty ventiliation fan (Panasonic....mounts remotely) that blows through a HEPA filter into my darkroom providing positive pressure. The second thing I have is a film cleaner off of a Fuji Frontier printer otherwise known as the Kinetronic static vac. I found one on ebay for $50 or so.....best $50 I ever spent. After using that, I still look at the neg before putting it in the enlarger and blow off any remaining dust with canned air. Yeah, I hate spotting.