Remove the cart from the battery or device
Warm the cart gently in your hands for a few minutes
Blow lightly through the mouthpiece
Use a thin pin or paperclip to clear the airway
Wipe the mouthpiece and connection points with a cotton swab
Check for visible oil blockage in the airflow holes
Stand the cart upright and let it sit for a while
Take a few short test pulls without activating the battery
Use a lower voltage setting if available
Replace the cart if it remains clogged