Hi i buy for every month... As i have a huge home... To my disappointment 2 stoped spraying and they where about quarter full still... I always change the battery's so it so not the problem... It was the cachmear wood and the vanilla two that was the problem... I only use Glade as it smell is awesome and it last long the fragrance... This is not the first time... Its happend a few times... Can i just disposed of it... I dont keep the slips so i had no proof to take it back to exchange... At checkers walmer park P. E. SO AT THE MOMENT I HAVE NO AUTO SPRAY REFILLS...AS MY HUBBY KINDELY DONATED THE OTHERS WE BOUGHT... TO OUR CHURCH FOR THE BATHROOMS. User's recommendation: I would recommend it, its the best... Just that problem must be sorted... I cant waist money like this...