I'm having trouble & keeping timer set I followed instructions & after I disconnect it, it resets. I put new batteries should I return? How do fix it?

Thank you for your Gemmy purchase, I am sorry your item is not function correctly! If you are still in possession of the item we would like to assist you with this issue personally. Please contact our customer service department directly at trishac@gemmy.com and we will be glad to handle this issue for you. Thank you, Gemmy Customer Service