How to clean dry "goats" in the nose in a 4-year-old child?

I would suggest trying a solution of sea water, preferably after bathing, which should soften the lumps. Sample products I link below - you can both compare prices and add products to the basket: https://www.gdziepolek.pl/produkty/74746/sterimar-baby-aerozol/apteki https://www.gdziepolek.pl/produkty/88313/disnemar-baby-aerozol/apteki https://www.gdziepolek.pl/produkty/46425/marimer-baby-spray-aerozol/apteki A four-year-old child can already blow his nose on his own (it is worth teaching and encouraging this) - after applying sea water, he should vigorously snotty. If there is a problem with this, you can use a nasal aspirator, for example: https://www.gdziepolek.pl/produkty/99724/vitammy-colibri-aspirator-elektryczny-przyrzad/apteki https://www.gdziepolek.pl/produkty/39874/katarek-standard-aspirator-przyrzad/apteki