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Tobacco products.

Accordingly, a British physiologist, Richard Doll published his findings in 1950, proving that there is a close association between smoking and lung cancer

Our study has found compelling evidence that smoking has a long-lasting impact on our molecular machinery, an impact that can last more than 30 years...The encouraging news is that once you stop smoking, the majority of DNA methylation signals return to never-smoker levels after five years, which means your body is trying to heal itself of the harmful impacts of tobacco smoking." Roby Joehanes, an instructor at Harvard Medical School

Then, you'll want to spray the area with a grease cleaner and wipe down the damaged area with a clean cloth or sponge until the stains are gone