Instant cold compress leaked, what to do?

I ran out of an instant cold compress, into my bed on my floor, on my bedside table and on my laptop first white crystals formed, I tried to wipe it off with water. Now the question is kind of poisonous, what can I do to make sure everything is gone? Have read on the Internet, ammonium nitrate is toxic, and extremely harmful, is that only when it burns? What can I do?

Well, I'm not an expert now, but I would be extremely careful. I also think that it is very harmful to the skin. Maybe corrosive? It is best to clean it with gloves or with an old towel, but avoid skin contact and do not inhale too much.