I use Maxx Scoop Multi Cat 24/7 Clean laundry scent. It really does smell like clean laundry. My male cat is a jerk and he thinks that he's the litter box monitor. Whenever he hears my other cat in the litter box he has to check out what she's doing, then he waits to pounce on her when she gets out. Sometimes she'll just lie down in the the litter box and wait for him leave before she gets out, so she pretty much always smells like clean laundry too.