My one bathroom sink would just randomly stink there's no way around it, it stunk. I would have to get bleach, pinesol,denture tabs,or drain cleaner to get rid of the smell. Not anymore I use these sticks and although they themselves don't give off a smell my sink has not had that icky stink that I've been fighting for years anymore. I recommend anyone that has a problem with a funky smelling sink easy sticks I use them throughout my house just in case and they are my new go-to drain cleaner or should I say keep my drain clean er.