How to clean a cotton grain bag for reuse

I recently got into brewing (well, extract brewing) and all the kits I use come with a grain bag. I've since learned that it is perfectly fine to reuse these bags, so long as you clean + dry them properly.

The problem is, every time I use them, they have hundreds/thousands of tiny seeds/husks/"stuffs" caked onto them. Even after meticulously washing and cleaning them, I still end up with a clean + dry grain bag that has hundreds of seeds/husks/stuffs tangled up with the bag (which is made of cotton).

So I ask: are there any known tricks to getting these hundreds of "stuffs" dislodged from the cotton bag prior to cleaning it, or do I really have to sit there with a pair of tweezers and pick them out one-by-one (because if that's the case I'll just buy a new grain bag each time - they're only a few bucks).

But, I don't like to be wasteful, so I'd like to reuse if possible. Thanks in advance!