If your baby has a diaper leak in the middle of the night, the traditional options have been to 1) replace the crib sheet with a clean one in the rare case your sleep-deprived brain has remembered to keep a spare, or 2) do laundry and sob. (You can’t just drape any old blanket on the bare mattress and say “see ya in…
Source: LifeHacker – How to Quickly Change Crib Sheets When There’s a Nighttime Diaper Leak