Short answer
Clean, fresh air in the baby’s room matters. The safest method is brief but effective airing while the baby is in another room.
Step by step
- Take the baby to another room.
- Open the window fully, or create a brief cross-draught with opposite windows.
- Once the room is fresh, close the window or leave it ajar.
- Check the room temperature and bring the baby back.
Made to measure: hook-and-loop or roll

