I'm very new at this as I myself don't have a child with autism but I found this post on another website I hope can help you. "My daughter was 7 before she even acknowledged she was wet - today at 11 she still has accidents. Whether the wetting is connected to her pdd-nos nobody can tell us, but her not caring she is wet is the biggest issue, and is linked. we worked with a specialist nurse and school staff to ensure she realised being wet was bad, only then did it improve, though she still leaves it too late when busy."

I am having a similar problem with my 7 year old son he wont pee in corners or anything just in his pants. We finnaly got him to stop hiding his pee soaked cloths in his room. We made a pee basket for the bathroom we took a small box with a trash bag in it for him to put his cloths in. He doesn't get in trouble for the cloths in it. We still have problems with him not telling us he is wet. He will sit in it ir wait to long and cant make it. But when we ask him are you wet he says no when he is. He lies about it. We tell him every time your not in trouble for the accident your in trouble for the lie. How do i get him to understand this. Also he doesnt have accidents at school or if we go out of the home. Its just at home that he pees himself. At night and durring the day. My 4 y/o reminds him to go potty. Im at a loss as to how to get him to stop having accidents then lying and understand why he's in trouble. He has had about a week where he told us every time and he didnt get in trouble. Please help.

All I can share is what I would do if in your situation. When you find that he's gone in his pants say, "Uh-oh. You had an accident. You need to go potty in the toilet, not in your pants." And you can't get noticeably mad either. That could be one reason why he wouldn't say anything, cause he's afraid of getting in trouble. You probably already know this. But he should be rewarded for sitting and going on the potty. Also, you could try having bathroom visits on a regular schedule, like every half hour...at home and at school.

Was your son ever fully potty-trained? ie. went more than 6 months without an accident?

@Jill-Longnecker - no he was never fully trained. Most of the way, he got to the point of maybe 1 daytime accident a month and 1-2 nights a week for urinary accidents. He did go for ...ummm....a year and a half with no bowel accidents (other than skid marks which he always has).
Does that change how we should handle it? Thanks