I've put this activated charcoal air freshener in the baby's room near the diaper pail, to help with residual odor, and so far I'm pretty pleased. It doesn't mask the smell; it removes it. The packaging says it can be set out in the sun every so often to recharge. I haven't had to do that yet, but it's good to know.  I received a discount on this product in order to provide a review. My opinion is honest and unbiased.