Are you speaking of the setting for your
humidifier, not the pressure of the air, because a person would be in
trouble at a pressure setting of 3 as that is not high enough to flush out exhaled air, and probably not enough to splint any airway open. Can you clarify what those 8 and 3 numbers actually represent? It would be helpful.
Have you found a natural or maybe even non scented soap? Also, soaking your equipment in a solution of water and white vinegar can rid it of body oils, etc.