Store completely cooled Lemon Roasted Pumpkin Seeds in an airtight glass jar or tightly sealed container for up to 7 days at room temperature. Refrigeration can introduce moisture, so it isn't my first choice for maintaining crunch. You can freeze them for up to 2 months in a freezer-safe bag with the air pressed out. Freeze only after they've cooled for at least 30 minutes because trapped steam creates ice crystals and soft shells. To restore crunch, spread the seeds loosely and reheat them at 300°F for 4 to 6 minutes. Then cool them for another 5 minutes before eating. Don't add extra lemon juice during reheating because fresh moisture will soften the shells again. Discard the batch if you notice a stale paint-like oil smell, visible mold or unusual dampness. If the seeds simply taste flat, fresh zest can revive them after reheating without making them soggy.