If the noise is lower, the AC service may be the cause. Magnetic fields from transformers can cause humming. Mains transformers typically cause an AC magnetic field around them. This magnetic field can be copled to wiring, electronics or signal transformers and cause humming.
Baby oil can be used for removing makeup. Pour a few drops of it on a cotton ball and gently wipe the makeup off your face. Rinse your hands, face with cold water, and dry the skin using a soft towel. Baby oil removes all of the makeup without harming your skin.
Lavender Oil is a great oil to use for children's minor cuts and scrapes because it is anti-bacterial, calming and is considered safe enough to use with children. It is the essential oil of choice used in AromaWeb's Boo Boo Juice recipe. I've only mentioned a few of the most common uses for Lavender Oil here.