Never, ever keep chocolate in a pocket. Avoid keeping chocolate in a backpack. If you have air conditioning, you should be find leaving it out. If you don't have air conditioning, freeze your chocolate and then defrost it an hour before consuming.

Never, ever keep chocolate in a pocket. Avoid keeping chocolate in a backpack. If you have air conditioning, you should be fine leaving it out. If you don't have air conditioning, freeze your chocolate and then defrost it an hour before consuming.