How often do you clean your LO's bedding? Do you do just the sheets/pillow cases or the comforter every time?

I try and wash their bedding every few weeks, unless needed sooner. They go to bed clean so I don't feel like it needs it more than that. Of course my youngest has had some diaper issues this week so her bedding has had a lot of extra washes. I just did the sheets only though, her comforter stays folded up at the end of her bed in the warmer months anyway.