Inhaling steam from hot water, potentially with eucalyptus oil, can open airways and decrease congestion.

“and actually can can be — actually very soothing in fact one of the things that I found very soothing and there are actually some data in the literature on this is if you get a cold and you're congested is just U heating up some hot water on the stove putting a towel over your head and just inhaling that steam it tends to open things up and uh decrease the congestion and I've been known to put a couple of drops of eucalyptus oil into that and that's actually been beneficial as well”