A+D ointment (£25) is essentially my secret weapon when it comes to keeping baby comfortable for long stretches of time at night. After bath time, I apply a healthy coat of this to his baby bottom to act like a moisture barrier while he's sleeping. If I don't apply this, I notice he wakes up in the middle of the night fussy and uncomfortable in his wet diaper and I'll need to change him. Pro tip: get the tub instead of the tube if you can, makes application 10 times easier!