Refrozen Before It Thawed: What Partial Re-Freeze Cycles Do to Gel
A reusable pack comes back to the depot at 11:00 with a hard core and a slushy shell. It goes straight into the freezer, because the rule is that packs go back in the freezer. Nobody records that it never fully thawed. Over a season, packs on this route see a hundred partial cycles instead of the fo…
