My 5 year old is the same way. He was put on the miralax a couple years ago. It was way too strong for him. He was having accidents all the time. The thing that works best for us is the glycerine suppositories. They usually work within 10-15 minutes. It doesn't make it any softer, but it gets it out. I recently tried the pedia-lax fiber gummies, but no sucess with those yet. He only goes about once a week, and usually needs the help of the suppositories. It's awful!