How on earth do you huff oregano oil? I have a jar of gelcaps in the fridge, and that stuff is quite strong when you break them open!
I think you just put a few drops of oregano oil in a bowl of hot water and do the whole stick your face in the steam and put a towel over your head thing or you use one of congestion reliever steamy things.
I sometimes put two, and only two because it is so strong, drops in a my water pick thing.
Bring about 1/4 inch of water to just steaming in a small saucepan. Put a drop or two of 100% oregano oil into the pot. Put your face over the pot and veerrrryyyy slowly inhale. The first try you WILL cough, as it is harsh. But with a little practice you'll learn to draw it through your sinuses and mouth deeply into your lungs.
Clean the pot afterward or the next thing you cook in it will taste like oregano. Ask me how I know.
I've made pills with a few drops before, but that was for a funk that had already taken hold. The oregano do repeat FYI. Also, be careful with this oil as it is about as hot as habanero. If you make pills, wear gloves.