Sleep issues with My Autistic son.

Have you evr had sleep issues with your child who is on the Autism Spectrum Disorder? I have and am trying to find new ways to keep my son asleep through the night. I have done some research and found that 40 - 80% of children on the ASD spectrum have sleep problems. Some have said that sleep may be affected by associated disorders and can worsen daytime functioning. I have noticed that my son has been sleepy at school and is affecting his behavior. I have found out that the use of melatonin and lavender scented body lotion or wash could be helpful. I will be trying these products this week and will see how they work.