Just depends on how serious you want to get about this. All the advice above is valid, but basically a Stone Age approach to the problem.
There are probably quite a few more extensive discussions on past threads somewhere. Or just pull up a site or look at a catalog from any
clean room supply co, like those that serve the circuit board industry. Then identify the sources of lint and dust in your darkroom - where they
are actually coming from. Something as simple as a cotton shirt can give you hell.