Ensure the rectangular air intake vent at the bottom of your tent is open to allow fresh air to continuously flow into the front of your stove. Also make sure the air control vent on the ash tray is in the fully open position. Light a fire in the stove using fire starter squares and 1-2 pieces of dry hardwood firewood (maximum 16 inches long - we recommend using 12 inch long pieces).
Close the stove door and latch it shut. Let the fire get going and run for about 15 minutes before opening the stove door and adding another 1-2 pieces of hardwood firewood. Close the stove door, latch it shut, and wait another 15 minutes. Now your SweatTent should be nice and hot (180°F-200°F). If it's not, pull the ash tray out slightly and/or add another piece of wood.