cigarettes weight gain will smoking make you What Smoking Does to the Body Quit Nicotine After 10+ Years:
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however, many people also use smokeless tobacco products, such as snuff and chewing tobacco
They have no control circuitry and just deliver raw current from the battery to the coil

Development and Validation of a Clinical Risk Score to Predict the Occurrence of Critical Illness in Hospitalized Patients With COVID-19
To ensure that the smoke doesn't drift back through the open window, consider using a small desk fan aimed toward the window
The temperature at which the battery protection function activates depends on the device

Standard cleaning and repainting would not have resolved it