A joint that burns crooked is usually blamed on the roll, but the roll is only the last third of the job. Flower that is too damp steams instead of burning, flower that is bone dry burns hot and fast down one side, and an uneven grind leaves pockets of air that turn into runs. If you fix nothing else, fix the moisture and the grind and most of your problems disappear.

Aim for flower that feels springy when you squeeze it and separates when you pull it apart, not crumbly and not clumping. If it is freshly bought and still soft, leave it out of the jar for twenty minutes before rolling. If it crumbles to dust in your fingers, a humidity pack in the jar overnight will bring it back. For a single joint, a sliver of fresh citrus peel in the grinder for ten minutes does the same thing, as long as you take it out before it makes the flower damp.

Grind should be even, not fine. A medium grind where every piece is roughly the size of a grain of rice packs predictably. Too fine and you get a tight, suffocating cylinder that pulls hard; too coarse and you get gaps that feed air to the cherry and send it running down one side.

Lay the paper flat with the gummed strip along the top edge, facing away from you. The gum should be the last thing you touch, not the first. Hold the paper by the two outer corners with your non-dominant hand and let it curve naturally into a shallow valley.

A filter is not just a mouthpiece, it is a structural part of the joint. A rolled cardboard tip about the width of your finger gives the paper a rigid cylinder to form around, keeps the end from collapsing when you draw, and stops flower from pulling into your mouth. Roll the tip loosely enough that air passes through it, then slide it to one end before you add any flower.

Spread flower along the paper in an even ridge, slightly thicker in the middle and tapering toward the tip. Leave a clear centimetre of paper at each end. Resist the urge to press it down flat into a brick, which is what makes a joint smoke like a straw with a blockage in it.

Now the part people rush. Pinch the two edges of the paper together between your thumbs and index fingers and shuffle them back and forth, letting the flower roll into a cylinder inside the paper. Do this until the shape holds itself and the flower is tucked snugly against the tip. Only then do you tuck the near edge of the paper over the top of the cylinder, press it into place, and roll the rest of the paper up to the gum line.

Snug is the target, not tight. If the paper is smooth and firm with no visible slack, and you can still draw air through the unlit joint with mild resistance, you have it right.

Lick the gum strip lightly and evenly, from the middle out toward the ends, then press the seam closed and run your thumb along it. Too much moisture makes the paper wrinkle and swells the seam so it burns unevenly; too little and the seam opens halfway through the smoke.

Let the joint rest seam-side up for a minute before lighting. Tap the tip end gently on the table to settle the flower down and even out the density. If the end looks hollow, top it up a little and tap again.

Hold the flame to the very tip and rotate the joint while drawing gently, keeping the flame from touching the paper directly. The goal is a flat, even cherry across the whole face of the tip, not a hot spot in the middle.

If it starts to canoe anyway, do not crush the fast side. Wet your fingertip and run it along the paper just below the cherry on the side that is burning too quickly, or rotate the joint so the slow side faces up, since rising heat dries and feeds the paper. Most canoes start from a gap in the fill or a stem sitting against the paper, and both are visible if you look at the tip before lighting.

Even medium grind, springy flower, a loose tip, flower distributed rather than compressed, a snug tuck, a dry seam, and a tip that is filled flat before you light. Miss any one of those and you will chase the symptom instead of the cause.