H.B.
I have a 5 (almost 6)year old daughter who is doing the same thing. I cut her off w/ drinks after dinner and wake her up and take her to the bathroom when I go to bed-but this doesn't always work. My sister-in-laws have both used the alarm mat thing and swear by it, but I am still not ready to try that method. I guess I keep hoping she will grow out of it. I sometimes get frustrated b/c my 3 year old boy has been dry trough the night since he was potty trained at 2. Good luck with whatever you decide!
H. B