Mites in seeds

I first noticed mites in a paper bag of lavender heads I'd collected from the garden years ago & I think I ended up throwing it away.

Yesterday I looked in my tin of veg seeds & saw something that is probably similar. They are really, really tiny, possibly almost beetle shaped & very fast running.

Does anyone know what they are & how to clean seed I collect from the garden to get rid of them. Also if anyone has any ideas how to get rid of the ones in the tin of bought veg seeds, peas etc. They are in old biscuit tins in the unheated, dry garage. 

I wanted to give a friend lots of seed packets that I may not use, but don't want to infest her collection too.....

No ideas anyone?

I saw you post -not sure there is anything other than spraying them in the container-I am not sure these beetles will infect the germination of the seeds-the other alternative is to throw them away-not what you want to do?

Could they be flea beetles?

Would freeziing for a while help? I've no idea if it would but I know it's advised as a way to kill house dust mites so mite (he hee) work and a lot of seeds can stand freezing.
Just a thought.

If they are red in colour I would say spider mites, if greyish, they could possibly be pollen mites

Too tiny to be flea beetle I'd say, not red at all, I'll look up pollen mites. I often see them in seed heads when I'm collecting them. I often wish my eyes were less sharp! I'll look up pollen mites. 

I wonder if all seed is okay frozen, mind you I'm not sure I could put creepy crawlies in my freezer, however well sealed the tub they were in! 

I think it's going to be more about how to clean seed I collect from the garden to avoid getting them in the future.