Bugs do love film. I usually find little spiders nest on the film I’ve rescued from sheds and garages.
Winding the film through a soft, lint-free cloth is a good place to start with a dusty film. Just use light pressure and move to clean surfaces of the cloth as it gets dirty.
If you want to spot clean the film the easiest thing to use is 99% Isopropyl Alcohol, it will not dry out the film. Make sure it’s the 99% (anything below about 91% contains too much water and will damage the emulsion) and it will be perfectly safe to use on any type of film. I use PEC Pad’s to do spot cleaning with some alcohol on them with light pressure so you don’t scratch the film. It will evaporate quickly but make sure you don’t wind the film onto itself while it’s still wet.
Kodak has recommended cleaning solvents if your curious.