Dribbling / drooling at 4 years old

[timeforabrandnewnameagain]

My DS still dribbles, so it will run down his chin from his mouth. I have managed to teach him to notice and wipe, but it seems bad again at the mo.
DS had his tonsils and adenoids out at the start of the year and whilst he is less congested, it hasn't helped the dribbling. I think in part it's from having his mouth open and not breathing through his nose. I do this too.

What can I do ? He is starting school in September. He's not under ENT now and they have been so dismissive of the dribbling.

How can I get him to breath through his nose. I feel like I'm ordering him all the time, so should I just add in close your mouth

Anyone ? Just us then ?

Not just you.
But I'm not going to be much help as DD is 15 now and still a bit dribbly at times .

Cheers @TeenPlusTwenties it's a tough one. When I did speak to the ENT he said they use Botox, but that my son doesn't have sores from dribbling, so wouldn't be considered bad enough . Do people get chin sores ?

Ds dribbles all the time, but has since a young age, I imagine wiping with tissue might cause irritation , but he was mobile from a young age and it was never easy to be wiping him constantly. He just uses his arm now

I suppose it's on my mind as everyone is so germ phobic with Covid and he then dribbles on the table when talking He's such a handsome, lovely boy I just don't want him to be teased.

DD's shirt always used to be soaked and until 3 needed a permanent bib.
We found it improved when she stopped having so much milk (could have been a coincidence).
Mouth hangs open when concentrating, needed regular reminder to suck in the dribble.
Improved slowly with age.
Has improved since she got her brace around 2 years ago, but it is an issue enough that pastoral care at secondary mentioned it to us at one point.
DD has poor motor skills, don't know if that has impacted.

re being teased. I suspect if otherwise confident and good with peers it won't be an issue. DD isn't so I suspect it has been another way which has marked her as different.

That's interesting @TeenPlusTwenties although DS doesn't drink milk but eats tonnes of cheese. And I'd say his motor skills are not brilliant. Not sure what I can do on this either. We try. He's not particularly confident as has had a speech delay. He didn't speak until 2. He was like a waterfall as a baby!

Ds' speech has impacted his social skills / interactions. He's come on massively and talks now in slightly jumbled sentences. I had hoped that more talking might improve the muscles and help the dribbling. It hasn't made a difference and to be fair any mouth muscle exercises I had read up on had said it's not proven to work, it just might help.

I am trying DS on some hay fever medication from the chemist ( I spoke to them) as his nose is very runny for the summer. I wonder if it's an allergy being congested might make him month breath more? First day today, slightly less nose run so if anything amazing happens I'll come back and post. We do have pets too so maybe could be a pet allergy or he is just a snotty dribbley type? . That reminds me I should Hoover more