It is really hard for kids that have speech delay to understand what they need to do at a certain age and even more challenging if they are autistic. I have an 8-year-old who wasn't toilet trained until age 4 1/2 and a 4-year-old who still doesn't wet, but he is still more speech delayed. He just learned to say "cookie."
My point is GoodNites® are really good and less expensive than the ones that are sold by catalog for kids with disabilities. In these two cases, especially with the coupons, not once did my kids wake up wet. Thank you GoodNites®.