Two of my Sweet Bay plants have dried up and appear dead. During the summer, they are outside but in the winter they are inside. One other plant appears healthy. They are in the same location and watered the same.
It can often be too warm and dry indoors for Sweet Bay Plants. They can tolerate some cold, even to just above freezing, but should be indoors if the weather is below zero or you live in a cold climate.
Water less in winter and keep the plant in a cool but very sunny location.
You can try setting on a tray of pebbles and water to increase humidity. Misting is not recommended.