Hi radu
Quite a 'hairy' story

... these mites look weird and seem to be relatively big sized. Thanks for the pictures and the cool clips (really interesting)!
Sometimes it's not necessary to throw everything away: Either the mites run out of food (which makes then run around everywhere in search of some) or keep them very dry for 1-2 weeks (well... they will search for water....). So if the weather allows it, put the box outside or use something to prevent the mites from leaving the box (like a baking plate full of soap-water underneath it).
Grüessli
Andreas