I’ve always found that a diffuser is the best way to administer essential oils to the room when you are suffering with colds/breathing difficulties or sleep issues etc. The vapour that pours from the diffuser pod is not at all hot, so no injuries can occur, and it takes a very short while from turn on for the vapour to appear.
Firstly the pod is filled with water to the fill line on the inside of the tank, then you add to the water whichever oils you require, a few drops is all that is necessary and you can add several together - Lavender for sleep, favourite room fragrance, Eucalyptus for a cold etc and replace the lid and turn on. After a few seconds the vapour appears out of the funnel/vents and intermittently disperses the oils into the air. Not only do these diffusers give you amazing health benefits, they also are beautiful items to have in the home, as many have lights and colour changes for atmosphere.