If you don't feel up to the task of doing the work yourself, send it to a high quality lab. Any good lab will clean the film or re-mount immediately. If you do your own darkroom work there are a few things that will make a big difference. Filtered or purified water helps a lot. I use it for the developer, fix and the last two baths before hanging film or prints to dry.
Water quality makes a big difference.
So does the air quality. Since buying a large Honeywell HEPA air filter I have cut down on dust on film in the holders and in the printing as well. My print spotting has gone way down. If you saw my darkroom you would probably wonder how clean prints ever come out of it. The air filter makes a world of difference.