custom cutting film, keeping it clean

I was wondering if anybody had a technique for custom cutting film and keeping it clean, or to clean it before loading?
I've been cutting up kodak's aerocolor 2444 5 inch film into 10 inch pieces. It's a nice film. The black spots and fibers, though, don't help a scenic's sky.
Is there an outfit that's reliable that does this type of work?

Get some dust off refills and the 360degree nozzle. I remember seeing something about cutting film either here or on photo.net recently.