Try and be consistent. Routine is very important for babies, and all children for that matter.
My favorite way is a diffuser. Contact me if you need help finding one.
There are so many different combinations of essential oils that can be used to help you achieve the result you are looking for.
Although most of these are intended for a diffuser, feel free to make a mixer in a roller-ball bottle, too. You will still get your desired outcome.
Essential Oil Blends
There are multiple uses when blending essential oils. Some are topical and a few can be taken internally. One of my favorite ways is aromatically, and my absolute favorite aromatic way is with a cool mist diffuser. There are other ways, including smelling straight from the bottle, placing a drop on your pillowcase, or putting some on a cottonball or tissue and placing it in your car or on your table. Try making room sprays mixed with water in a glass bottle so it's easy to access whenever you need.