Even the finest cigars can turn bitter which can ruin your smoking experience. Here are four common reasons why they turn bitter and solutions: 1) Over humidification. To avoid it, keep your humidor’s humidity level within a 65% to 74% range. 2) Over puffing. Take a puff a minute to avoid a bitterness. 3) Improper lighting. For a proper light, hold the cigar above and near the flame. Rotate it to get an even burn. Hold it until there is a glowing ring around the foot. 4) The cigar’s head is too wet. This happens when you keep it in your mouth for a long time. To avoid a wet-head cigar, hold the cigar in your hand or rest it on an ashtray between puffs.