In the Many Many years I've spent in the darkroom, both colour and B&W, I have used the Ilford Antisaticum clothes to rid film of dust and protect it against attracting more dust. It has always been in my arsenal for printing and is still used when scanning film of any format. Also a light bust of compressed air, aerosol or otherwise. But make sure it is indeed a light burst, since a prolonged bust can also create static on the film, which would of course negate any previous cleaning procedure(s). I also have an anti-static brush I use along with the Antistaticum Cloth. As far as the PS Dust and Scratch filter is concerned, in my opinion it's garbage, NEVER use it. When retouching scans, film or prints, my first step is to add a new layer above the image layer and do the fixes there. Then, after fixing one area to your satisfaction, flatten, save and add a new layer and start another area. Of course you could do all of the work on just one added layer, but if there's a problem you might have to delete that layer and start again. By doing one area at a time you will not encounter that issue. And as mentioned, it's usually just a matter taking the time to do the work, no auto fixes of any high quality that I've encountered.