Are you storing it at “room temperature” (77 degrees). I failed to do that and it stopped working for my boys. I threw out all of the meds and started with fresh pills and it’s working again. 
--
Terri Jennings with Teeny, Finn and Elliott
Arcata, CA
https://ecir.groups.io/g/CaseHistory/files/Terri%20and%20Teeny
Joined 2019