Frustrated Father

So our son is a month old now. I've noticed in the last week or so my husband is getting really frustrated because our son is really fussy when he is watching him. I don't know what he is doing wrong or why this is. I don't know how to help him. I find I come take the baby and he calms down pretty quickly. Anyone else experience this? What did you do to help the two bond and help your husband learn to sooth the baby...