When opening a homeopathic remedy bottle, be aware of strong odors that may affect the value of the contents. A room that has been freshly painted with strong smelling paint or one that’s just been scrubbed with Spic and Span can cause antidoting. Antidoting a remedy means that it is rendered useless. The worst offenders of antidoting are the following essential oils: mint, camphor, eucalyptus, tiger balm, and tea tree oil. These substances will antidote not only a bottle of a remedy, but also the action of the remedy after taken. Take care not to use them after ingestion of a remedy.