What Ronald said, and two other little things -
When loading the holders, wear a plastic apron or lab coat, or something that is not cotton, to minimize your own lint. I made this change in the 70's working in graphic arts transferring large film images, and it made a real difference.
Turn off the air cleaner when you get ready to load holders to minimize air movement in the room.
The earlier comment about humidity is helpful too. You can load film anywhere that is dark, so if you have a space in your basement (if you have one) or some such place higher in humidity, it will help minimize static electricity. I have used a bathroom in the past (some don't have a window, so it's easy to light-proof) and control humidity with the shower.
OK, three things.