They pointed out that a careful review of the data [from the French study] instead reveals the findings are more likely due to statistical flaws and sampling error, along with poor rates of screening and documentation of smoking history by physicians. They also expressed concern that the lead author of the French study, Jean-Pierre Changeux, had ties to the tobacco industry, having previously accepted $220,000 from the tobacco industry-funded Council for Tobacco Research in the 1990s, and collaborated with RJ Reynolds and Philip Morris. Until we have unbiased data, supported by solid research design, and free of any tobacco industry influence, we would caution against the likely myth that smoking protects from acquiring COVID-19, Maa and Halpern-Felsher wrote.
Then you run into the fact that sometimes it wont produce vapor
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Abstinence was verified through periodic checks at 4 and 24 weeks: from the data of previous studies, the researchers expected to have 50% of smokers able to give up smoking already in the first four weeks
Hold the cigar at a 45-degree angle about an inch above the flame
Increasing activity and breaking up work into small blocks of time are good strategies