If you are inclined to have any Essential Oils in your home, you should be certain you know how to use them. Very few oils can be used directly on the skin without damaging the tissues. Oils that are derived from flowers are the safest guess, but even those can often be too strong. The safest way is to dilute the oils in either a base oil or milk.
Most essential oils have anti-microbial properties, this means that most oils will kill germs. Some oils even repel bugs and spiders, the mints and eucalyptuses for example.
My favorite way to use essential oil is to put it in a spray bottle with water and a drop or two of dish soap. The soap helps the oil mix into the water. I can then spray the oil on my skin, or around the room I am in. It’s a nice way to scent myself or the area without being overpowering. I use a blend of eucalyptus, spearmint, and lemon for bug repellent. Wintergreen and bergamot make a wonderful perfume.
Have fun with the mix, different oils blend differently for different people. Even when mix in the exact same quantities. Play with your oils, learn what you like.