Should I turn off white noise once baby is asleep?

You do not have to turn white noise off as soon as your baby falls asleep, but you also do not need it running all night. Some parents like to keep it on continuously at a low level to prevent early wakeups from household or street noise. Others use our machines’ built in timer so the sound fades after one or two sleep cycles, once baby is in a deeper sleep. Both approaches can work; what matters is that the volume remains gentle and the machine is placed at a safe distance from your baby’s ears. If your baby sleeps fine without it, there is no need to force its use, and you can phase it out whenever you prefer.