New to CD here. I have a preemie who is 6 weeks old and weighs 4lb 14oz now. I have a newborn stash of prefolds and AIOs that won't fit until 6lbs. I have 4 covers that work now with preemie prefolds. How many times do you reuse the covers if they don't have poop? They don't smell like pee after using 2-3x. I don't want to buy more tiny covers.