A tobacco beetle is the scourge of cigar smokers. The beetles eat cigar tobacco, and although they are very small they can ruin a cigar very easily. Beetles begin as eggs, and when the temperature inside a humidor rises above 72 degrees, the eggs can hatch and form beetles, which will burrow out of a cigar. If you see a tiny, perfectly circular hole in a cigar, or little canals, it’s a sure sign of a beetle problem. For more, check out the video below.