Are my coats and hats safe?
Particularly the ones worn very recently (aka earlier in the day or on their way into the office?)
When will they be safe?
How do you know no lice or nits fell out?
Yes, your coats and hats are safe. Head Lice do not like coats or hats, they hold on tight to the hair when you are taking off your hat. They would never “fall” out of the hair, because they immediately start to dehydrate and die off a head. Any environment off a human scalp is too cold and too dry for head lice. So they do everything they can to stay 1 inch from the scalp where their whole life cycle takes place, breeding, feeding, laying eggs.