Olbas Oil x 28ml Being stuck indoors with a blocked up nose is miserable. Olbas Oil to the rescue! Just a few drops on a handkerchief is all it takes to help unblock even the stuffiest blocked nose, thanks to Olbas’ powerful natural decongestant vapours. & you can tuck the hanky into your pillowcase at night for soothing night-time congestion relief to aid restful sleep. For a really intense Olbas experience, put a few drops of Olbas Oil in a bowl of hot water, lean over it & cover your head with a towel. It’s enough to clear even the most stubborn of blocked noses.