I leave it playing throughout the night. My baby tends to be awoken by any slight noise at times, so the white noise helps to muffle out any other noise.
I fell asleep together with my baby while listening to it
Switch it off some time later after baby falls asleep.
switch it off after baby is asleep
Switch off after baby is a asleep
I switch off once they are asleep
I switch off after baby sleep.
switch off after baby sleeo
Switch off once asleep
I let it continue