I have a son 5 years that has downs syndrome. I have tried to potty train with very poor results. I have taken him to potty every 30 min. The reason I am concerned is that he seems to go enough to empty his bladder yet he still wets in between. He doesn't seem to recognize he is even going. I read that he may have a medical issue and I was wondering if I should pursue that or does he just need to mature more?