DH eats with his mouth open. He also picks his nose (or teeth/ears/eyes) constantly.
I want him to stop, partly because I find it gross, and partly because other people must do too. He has a high-profile job involving plenty of public speaking and high-level socialising. He touches his face so much that I can't imagine he notices he's doing, so it will be hard to stop even if he tries. He is 50 and this has got worse over recent years.
Now if I ask him to shut his mouth when eating he just gets cross and says I'm turning into a nag. He's not thick and does realise that nose picking and noisy chomping are not really socially ideal, but like most people is highly defensive when criticised and completely lazy about changing personal habits.
I know I'm NBU for wanting him to stop, but I'm not sure of what to do. I don't actually want to be a nag, and my current strategy has made zero progress in getting him to stop, so it's not at all effective. When he says I'm nagging I say the problem is not me, it's his open-mouth eating. Then we are back to square one, but with an atmosphere of resentment lingering.
Any suggestions? Either for how to stop it bothering me, or for how to stop him doing it.