Store separately from homeopathic remedies. Pregnant women should take extra precaution. Patch Test Put a few drops of tea tree oil on a cotton swab and apply to the inside of the arm. If you have an adverse reaction, irritation will appear on the skin within a matter of minutes. If the patch test doesn't indicate any irritation or allergic reaction, you may use a few drops of tea tree oil directly on the problem area of the skin once or twice a day.
Storage Always keep tea tree oil in amber-coloured bottles and store in a cool dry place.
The oil will stay potent and will not deteriorate from exposure to light, air, and heat. Do not store in plastic bottles. Cap should be on tight to avoid oxidation and evaporation. Do not store or use tea tree oil near homeopathic remedies, as it may contaminate your remedy. Some Notes on the Essential Oil of Melaleuca alternifolia.