I have a 3 month old who loves to be in the sling. She won't go down for naps for longer than 30 mins so usually ends up napping in the sling, although she sleeps well in her crib at night. I just wondered when you guys stopped using your sling? I don't mind having her in the sling so much now but I'm worried she'll never go down for naps when she's bigger! Did your babies just grow out of the sling? Thanks