Side lights:

The side lights should be kept clean and the lamps properly trimmed. Use signal oil in them. After lighting the lamps below place them in the lanterns, and let them burn for some minutes with the door open. This will dry out the moisture and allow it to escape. If you don’t do this, your glass will cloud with watery vapor. The cause of these lights refusing to burn is generally want of air, owing to overheating. The gas inside preventing the fresh oxygen from entering.