Anyone have any success stories with non-CIO sleep training?

What method did you use and how long did it take? Did you start with naps or bedtime first?

The sleep deprivation is really starting to affect my sanity and productivity at work. I’m hoping to find a way to help my 6 month old sleep better instead of progressively getting worse. I don’t even necessarily need her to sleep through the night but not waking up 4-5 times a night would be amazing.

Any advice other than CIO is greatly appreciated.