According to The Old Farmer's Almanac, there is a variety of natural methods to remove odors including baking soda, citrus fruit peels and vinegar. Open boxes of baking soda placed in the refrigerator help to absorb food odors. Citrus rinds placed in a running garbage disposal help to neutralize rancid smells. Two parts boiling water mixed with two parts vinegar helps to eliminate burnt food odors.
Removing deep carpet odors can easily be accomplished with a mixture of water, baking soda, liquid soap and peroxide. Dry baking soda also works well to freshen up carpeting prior to vacuuming. Placing a slice of vinegar-soaked bread in trash cans and lunch boxes helps to eliminate food odor build-up.
In addition to natural remedies, there is also a variety of products such as candles, sprays, oil warmers and wax solids that work to remove odors from the air by neutralizing the odor-causing bacteria as opposed to masking the odors with fragrance. There are also disinfectant sprays that eliminate odors and kill germs that cause illness, such as Staphylococcus bacteria. Electronic air purifiers are designed to remove odors such as smoke and dust, minimize allergens and improve overall air quality. Electronic air purifiers work best when the odor filters are periodically changed according to the manufacturer's instructions.