Starting at around 50/50 and adjusting as needed is still the best approach, though
last fall, the Philip Morris people signed an agreement with the Polish government to manufacture Marlboros in Poland under license

Some health effects of secondhand smoke include: Lung health risks or respiratory effects like coughing, wheezing, shortness of breath, chronic obstructive pulmonary disease, bronchitis, and pneumonia Cardiovascular risks like heart disease, high blood pressure, stroke, narrowing of blood vessels, and reduced oxygen levels Lung, throat, nasal, bladder, breast, or lung cancer Miscarriage, stillbirth, low birth weight babies, sudden infant death syndrome, developmental delays, and weakened immune systems Cognitive decline and dementia in older adults, behavioural problems, attention deficits, and reduced academic performance among children, anxiety and depression in non-smokers Take note that these short-term and long-term health effects may also be triggered when engaging in cigar smoking and consuming other tobacco products since they can produce cancer-causing chemicals

Even if your vape juice is nicotine-free, the flavourings and chemicals in the vapor can still cause yellowing or discoloration on your aligners
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