Kris, my boys wouldn't take a dummy so TBH I haven't been there. But I know that they do eventually get to the stage of being able to put it back in themselves. However, if you want to stop it now, do you have parents or friends nearby who could take Ewan overnight for a couple of nights, so that he isn't disturbed and then try the method Jus has talked about above? Just an idea, sorry if it's not helpful.

FWIW - DS2 is a thumb sucker and while we've never had to get up in the night to put that back in, it's going to be harder to stop him having that if there are problems down the track!