What is the best herb to use for steam inhalations?

I need something which will clear my lungs out :)What is the best herb to use for steam inhalations?
Use of eucalyptus or mentholated balm is common but they just clear stuffiness of the nose for a short while.
You are discussion about lungs and not feeler, for the lungs you need a bronchodilator to clear congestion.
Steam inhalation wont work.
Use a nebulizer it will clear the lungs.
Check what cause congestion in your lungs.
STOP SMOKING.
If you are a smoker, after it is difficult to ease congestion. It will preserve on recurring and organize to emphysema.
eucalyptis
eucalyptus, or menthol
Try Lemon Balm
Eucalyptus or menthol, or both together.
Thyme is regarded as the best herb for infusion .
If you want the spick and span product by thymol oil.
You could try mixing it beside lavender to calm your cough reflex
menthol and eucalyptus
One to tag on to the answers would be turnip.