I've read on how to set these up and I have a single question. The instructions say to fill the cooler up with a bleach solution, and let it dry in the sun to break down the bleach with UV. Is this absolutely necessary? It's winter and drying in the sun won't be very effective right now.
On a side note, I do have Sodium Metabisulfate (used in brewing/winemaking), which will break down all the bleach and evaporate completely if I have to do this step.
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