how to re-harden mints

[CanadianJohn]

I bought a large bag of mints from a bulk-food store. They were fine at first, but have now become too soft, despite being kept in a plastic bag.

Does anyone know how to re-harden mints?

[FedRox]

Fridge?

[CanadianJohn]

overnight in the fridge makes the mints harder, but nowhere near hard. I'll continue my research.

[Bigpinkslippers]

Dehydration or pop in the oven to dry them out? I've no idea really but according to Google moisture in the atmosphere makes hard candy go soft.