Nicole, are your negs in glass?
One of the things I use in my darkroom, which by the way is quite dirty as there are about fifteen trips a day between the house and the bungalow where the darkroom is and the door is kept open all day every day, is removeable magic tape. The door is kept open as we run back and forth to clean LASER'd rubber, as I'm a rubber stamp manufacturer in my day job.
Removeable magic tape has the same adhesive as what is used in post it notes. This adhesive is not savage and I use a small piece from a tape dispenser and pluck minute pieces of whatever off the neg. I also use a small compressor with a water filter on it to blow the negs for as long as it takes. I don't like canned stuff as eventually you'll get some real cold air coming out freezing your film. At least I always did!
Using a loupe assidously between blasts of air, then a final attack with magic tape. I very rarely have to spot. This regime came about from colour printing, because no matter how I tried, I could never spot colour prints very well.
I have used anti static guns in a commercial environment, they were reasonably successful, but not 100%. If you zap all of the +dust, what about the -dust?
Mick.