Avoid the nasty propellants in commercial cooking sprays by making a homemade version! Ingredients 1 part olive oil (or your choice of oil) 4-5 parts boiled distilled/filtered water (start with 3, and work your way up) 1 misting spray bottle Instructions Sterilize your spray bottle in boiling water. Place oil and water into spray bottle. Shake well before use. Store in the fridge for no longer than a week or so.