Hand Washing in NICU

Kirsten

First post here, my little boy is 10 days old, born at 27 weeks and 4 days and in high isolation NICU. My dad was walking out of the hospital the other day when he noticed my husband's mom and niece walking in. Neither of them signed in, washed their hands, or followed any of the cleaning rules. My dad reported them to the nurses and they said would keep an eye out and make sure they washed. My question here is whether or not I should make a bigger issue of it and tell my husband or just let the nurses take care of it? Edit for clarity: The only reason I am thinking of not telling my husband is because he would get so worked up about it. He is so careful about washing and so worried about germs.