My Boyfriend Clicks In His Sleep

How can I stop the clicking sound my friend makes while sleeping? 3

As soon as my friend fell asleep, a strange click came out of his mouth. It's useless and I have trouble sleeping: (At first I thought I was grinding my teeth, but apparently it happens when you breathe through your mouth.

I told her to shut up and try to sleep, which would stop the clicks, but disappeared halfway, her mouth opened and the clicks started.

Does everyone experience this? And if so, did you solve the problem?

I've had a nose test, I've already done it, and the Dominican Republic says it's because my nostrils are full of allergies or damage so I have to sleep with my mouth open and when I open my mouth, I sleep. Clicking sounds like his girlfriend.

My Boyfriend Clicks In His Sleep