Fill a large bowl with warm water (not hot). Place the sealed honey jar in the water bath. Let it sit for a few hours, stirring occasionally.

Place the sealed honey jar in a saucepan filled with a few inches of water. Gently heat the water over low heat, avoiding direct contact of the jar with the pan's bottom. Stir occasionally until the honey liquefies.

Preheat your oven to the lowest setting (usually around 150°F). Place the sealed honey jar in an oven-safe bowl. Put the bowl in the oven and let it sit until the honey liquefies.

Place the sealed honey jar in direct sunlight for a few hours. The sun's heat can gradually liquefy the honey.

Place the sealed honey jar in your car on a sunny day. The car's interior temperature can help liquefy the honey.

If you have the time, simply leaving the honey jar at room temperature for a few days can naturally liquefy the honey.