This woke up some memories for me - so I hope you don't mind me posting this here.
I was a childhood bed wetter fairly late. It must have been a lot of washing for my Mum - who did everything by hand.
I had various treatments which I've forgotten and which didn't work - but I do remember the thing that "cured" me was an alarm that detected when you peed the bed - which used pads with a sheet between them and woke you up with a loud noise. It was always going off by itself and was a pretty bad experience - though I had agreed to it.
Anyway I suppose it did the trick and I've not wet the bed since. I do wake up and go to the bathroom several times a night though - but I don't think that is particularly uncommon.
I'd have hoped in these enlightened times and with availability of disposables - kids would have been allowed to grow out of bedwetting by themselves, if they are going to - but I just looked on the internet and I see they still use these alarms.