Thoroughly wash the honey jar after using
Bee diseases such as Foul Brood from the US are imported and are easily spread locally. The endospores that trigger honey-borne disease remain in the honeypot. This happens when honey is left in discarded jars. In the fall, bees and other pollinators often forage for food and often find honey in discarded jars. They will bring the disease to the hive and spread to the whole hive.
Bees are animals without consciousness like humans, so what they do is just find things that are fragrant and sweet, they eat anything without anticipating pathogens. When you clean the empty honey jar before you throw it away, you help the bees to avoid infection. If you are a beekeeper, do not feed your bees with imported or blended honey! You should only use honey from your hive.