Have you thought of taking your 6 yr old to a Urologists?
The reason I am asking this is b/c my 7 yr old had been wetting the bed on & off for a couple of yrs., so his ped dr sent him to a urologist & we found out that the muscles in his bladder wasn't working right, causing him to go every few seconds throughout the whole day & night.
He was put on a few diff meds, but they didn't

at all. Now he is on Impramine to

w/ his bladder. He still has accidents at night, but not as many as before.
We did the same as you, waking up in the middle of the night, stopping liquids & all, but it doesn't work 1/2 the time.
Also, if you know it or not, bed wetting runs in the family.
Ask your dr about it.Or check out webmd.com about it.
Hope this

s some.
I would definitely ask for a referral to a urologists to rule out any other probs. Better safe than

.