Hi M.,
As a former bed-wetter myself, I can tell you a few things and what does/doesn't work in my experience - You are not alone:
* Sometimes bladders are not mature enough yet, and they just can't hold it in.
* They might be heavy sleepers, which is causing them to sleep right through the urge to go, and they end up going on the bed.
* Limiting liquids by a certain time at night may or may not work.
* For your OWN sanity, and less laundry, bring the pull-ups back.
* You can try waking them before YOU go to bed to have them go, this might help.
* There is a nasal spray that can be used, it's a hormone, that might help. Check with the doctor.
* The Bedwetting alarms didn't help me one bit, but you could try that.
* At the very least, I can tell you your oldest is probably pretty embarassed by this, whether he shows it or not, so the Goodnights would probably be a good idea for him.
* Whatever you do, please do not let anyone (or yourself) punish or embarass them anymore then they already are, and believe me, they are. This is not something that is within their control.
* They are NOT doing it because they are "lazy" so don't allow anyone to tell you this.
* They are not doing it on purpose, so don't allow anyone to tell you this either.
They will eventually grow out of it, but I was well into my teens before I did, no matter WHAT I tried. My boys 8 and 7 fortunately are not bedwetters, but my brother and I were, and it really stinks and is no fun! Try to have a ton of patience.
Good luck to you and I hope this is helpful!!