Vegetable oil blends can oxidize over time, especially when exposed to heat, light, and air. Store the 1 L bottle in a cool, dark cupboard — not on a sunny windowsill or near a radiator. After each use, screw the cap on firmly to minimize air contact. The packaging should display a period-after-opening (PAO) symbol (an open jar with a number like 12M); aim to finish the bottle within that timeframe for best scent and skin feel. If the oil develops a rancid, crayon-like smell or changes colour noticeably, discard it. For professional settings where the bottle is open frequently, consider decanting a daily working amount into a smaller pump bottle and keeping the bulk container sealed until refill is needed.
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