My husband gets like that when he has a lot of work stress. I have wondered if he might have some mild OCD considering some of the things he gets annoyed with. I have made some progress talking to him about it when things are calm, and it is helping. I've also started reminding him of those discussions when he starts up. I ask him if it is really about whatever he is nagging about or if it's because he had a crappy day at work. That has helped some as well.