Roger is co-founder of The Cabinet and a long-time cigar aficionado. He writes about humidor climate science here, with a particular interest in the often-overlooked physics of vapor pressure, dew-point margins, and thermal stratification.
Most 'this cigar burns terribly' frustration has nothing to do with how you held the lighter. It's the wrapper holding too much water, or too little, or a moisture gradient you can't see. Flame, foot, and the box the cigar came out of.
Mold doesn't grow because RH is wrong. It grows because something inside the humidor crossed the dew point. Here's the second number every humidor sensor should report.
70% RH became the cigar-world default through historical accident, not science. Here's why I run 65, the conditions where you should stay higher, and how to settle on your own number.
Vapor Pressure Deficit explains why a humidor at 70% RH can still dry your cigars. The science, the math, and the fix.