K.H.
My son is also a very hard sleeper and he still wets the bed occasionally and he is almost 7 but he gets better as time goes on. One thing my doctor reocmmended was something called a potty pager, it attaches to their underwear and an alarm will go off as soon as moisture is detected, it helps to teach their minds to recognize what their bodies are saying, even during deep sleep. I did not get it b.c as months went on he got better and better, but he is older so it may be a few years before you see a big change without a little help from a device like this. Its the Potty Pager, you can look it up online and your insurance may cover some of the cost if you look into it.