What happens next?

How to clean smoke off of a ceiling
Create a source of ventilation.
When dealing with caustic cleaning materials, you make sure you have good airflow in the room. You can accomplish this in many ways, but the most basic way to create ventilation is to open a window and turn on a fan.
If the room in question does not have a window, be sure to leave the door open and have a fan on its highest setting. Place a drop cloth beneath the cleaning area.