Diagnosing Burn Problems
Learn to tell canoeing from tunneling from a true plug, identify whether the cause is storage, construction or your own cadence, and fix each one mid-smoke.
Canoeing and runs
Canoeing is when one side of the cigar burns ahead of the other, leaving a scoop shape. A run is a narrow finger of burn racing up the wrapper. Both usually start at lighting: a foot that was not fully toasted keeps its head start all the way up. Other causes are a draught blowing on one side, resting the cigar so one side faces a heat source, or a genuinely uneven bunch. The fix is to slow the fast side and speed the slow side. Rotate the cigar so the lagging side faces up, since heat rises inside the ember, and touch up the lagging side directly with a flame for a few seconds.
Tunneling
Tunneling is the opposite geometry: the filler burns down the middle while the wrapper lags behind, leaving a hollow crater. It is usually a moisture problem. A wrapper that is wetter than the filler, which happens when a cigar has been rehydrated too quickly or stored in a humidor that runs high, will not keep pace with the core. It also happens when a bunch has a void running through it. Correct it by touching up the wrapper rim with a flame and slowing your cadence. Prevent it by rehydrating dry cigars gradually over weeks, not by parking them in a wet humidor for a day.
Plugs and tight draws
A plug is compressed or misfolded filler blocking airflow. Test before lighting with a cold draw. If the cigar is tight, first try gently rolling it between your fingers along its length, which can loosen a mild compression. If that fails, a draw tool or a thin metal pick pushed straight down the center from the head, an inch or two, often opens it. Do not attack it at an angle, which punctures the side. A perfectly firm cigar that draws freely when cool but chokes once lit is usually over-humidified rather than plugged, and dry-boxing for two or three days will fix it.
Splits, cracks and unraveling
A wrapper that splits lengthwise is almost always too dry, or it was dry and then rehydrated fast enough that the filler swelled before the wrapper regained elasticity. Small splits can be sealed with a dab of pectin, a smear of the sap-like gum from a cigar band's adhesive, or simply saliva on a fingertip, then held for a few seconds. A cap that unwinds means you cut past the shoulder; you can sometimes reglue it the same way. Cigars that split repeatedly in your humidor are telling you the RH is too low or that it fluctuates.
Deciding whether it is you, the storage or the roller
Run through this order. Did you toast the foot properly and is your cadence around sixty to ninety seconds? That accounts for most canoeing and most harshness. Is your hygrometer calibrated and is the reading steady? That accounts for most tunneling, sluggish draws and splits. Have several cigars from the same box failed the same way? That points at construction, and a reputable retailer or manufacturer will usually replace a bad box. One bad cigar out of twenty-five is normal in a handmade product. Five is a defect. Keep the cigar, keep the box code, and say so politely.