We adopted an adult cat a little over a month ago. She uses her litter box fine, and we remove any clumps or debris at least once or twice a day for her, but how frequently should we change the entire litter and wash out the box?

I bought this incredible cat litter a few days ago. It clumps pretty well and it is flushable! So convinient. The only problem is that when Nellie (my cat) drops a #2, the odor immediately engulfs the room. Is there anything I can put in the litter to stop the stench?

Thanks in advance,
Emily & Nellie