Name: Anne Summerville, SC (Zone 8a) Only dead fish go with the flow!
For large batches I'll put it in the oven at 200° in a roasting pan and stir it up about every half hour or so til all the pink crystals are gone. The key is keep an eye on it. I store mine in the metal tins sealed with tape.
Wanted to add that I've been using the same stuff for over 15 years now.
Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so.
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