You should also make sure that the bottle is stored upright, just like how it was intended to be. If it’s lying sideways by accident, the CBD can be exposed to other materials like the plastic lid or the pipette, which can contain impurities that get into the oil. Furthermore, if your CBD oil is meant to be consumed sublingually, you can help preserve it for a longer time if the dropper doesn’t touch your mouth; doing so can enable the transportation of germs into the oil, speeding up deterioration.