With anything just like skincare with water as an ingredient it would need a preservative. Oobleck has water as an ingredient and this is why some followers have been telling me their Oobleck smells bad. Placing it in the fridge in an airtight container will extend its life. I've kept Oobleck in the fridge for a week without any problems. It if is a bit dry just add a tiny bit more water 💦
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