How to Light, Fix and Relight a Joint

A joint should burn slowly and evenly from one end to the other. In practice, one side races ahead, a dry seam catches, or the whole thing goes out halfway through a story.

Most of that traces back to how the joint was lit, smoked and put out, and each problem has a quick fix.

Key takeaways

• Health Canada advises starting with 1 or 2 puffs and waiting, since full effects can take up to 30 minutes.
• Toast the tip with a flame held just below it and turn the joint, so the whole edge catches evenly.
• Joint canoeing, when one side burns faster than the other, usually stops once the flame touches the slow side.
• Put a joint out by pressing the ember into an ashtray, and wet the ashes before they go in the trash.
• A relit joint hits harder per puff than a fresh one, because cannabinoids build up toward the mouth end as it burns.

Smoking a joint without overdoing it

Smoked cannabis works fast. Inhaled THC starts to act within seconds to a few minutes, peaks after about 15 to 30 minutes and fades over 2 to 3 hours, a 2003 review of cannabinoid pharmacology found.

The trick to learning how to smoke a joint is patience. Health Canada tells people to start low and go slow to minimize health risks, with 1 or 2 puffs of a joint with 10% THC or less, and to wait, since it can take up to 30 minutes to feel the full effects. Our flower runs far above that 10%. Northern Lights, a Thai landrace and Afghani cross, lists 26% THC, so in our experience two small puffs of it make a full first round.

Skip the deep, held hits as well. The agency's lower-risk guidelines say deep inhaling and breath-holding raise the absorption of THC but disproportionately increase the intake of toxic material into the lungs. Take a normal breath of smoke, let it out and pass the joint. If a session still goes too far, a few simple steps help you come down from weed fast.

Lighting it the right way

Knowing how to light a joint saves flower and heads off most burning problems. In our experience, this routine works every time:

1. Twist or tear off any loose paper at the tip, so a flap does not flare up.
2. Hold the flame just below the tip without touching it, and turn the joint slowly so the whole edge toasts.
3. Take a few gentle puffs once the edge glows, keeping the flame at the tip.
4. Check the ember, and give any dark patch on one side another touch of flame.
5. Use a butane lighter or hemp wick, and if you strike a match, let the head burn for a second before bringing it close.

The goal is an even cherry, the glowing ring of ember at the burning end. A joint that starts with an even cherry rarely canoes later. In our experience, a torch lighter scorches the paper unless you keep it well back from the tip, so save it for windy days.

When a joint burns wrong

Most burn problems fall into three types, and each one has its own quick fix.

Canoeing

Joint canoeing is when one side burns faster than the other and leaves a hollow channel down the paper. Green's Dictionary of Slang defines the verb canoe as to burn down on top or one side rather than evenly, and it traces the name to the canoe-shaped hollow on the burned side. In our experience, the usual causes are a lopsided light, a breeze on one side, uneven packing or damp flower. California's testing rules pass dried flower only if its water activity, a measure of the free moisture in it, does not exceed 0.65.

To fix a canoe, touch the flame to the slow side until it catches up, or dab a wet fingertip on the fast side to slow it down. Then turn the joint now and then as you smoke, so the same side does not always face up.

Running

A run is a thin line of ember that races ahead along the seam, often where the paper is dry or the glue line burns faster. Some papers also burn faster by design, since makers add citrates and tartrates to regulate burning, and higher levels make a faster-burning paper. Touch a run with a damp fingertip to stop it, then let the rest of the ember catch up before the next puff.

Going out

A joint that keeps going out is usually packed too tight, rolled with damp flower or left too long between puffs. Keep the puffs coming every minute or so while it is passed around, and roll a tight joint gently between your fingers to loosen it.

The unexamined day is a wasted opportunity. Reflect on what you did, what you learned, and how you can improve.

John Dewey

Putting a joint out safely

Knowing how to put out a joint matters as much as lighting it. In our experience, the cleanest way to save half a joint is to press the ember gently into an ashtray until it stops smoking, without crushing the paper, so it relights evenly later.

Then make sure it is really out. Smoking has long been a leading cause of home fire deaths, and it caused an estimated 7,800 home fires and 275 deaths in 2021, according to the U.S. Fire Administration. Put water on the ashes and butts before they go in the trash, the agency advises. A few more habits help:

• Use a heavy ashtray with a wide base, or a metal can with water or sand.
• Never stub a joint out in a planter or mulch, since potting soil can smolder for hours before it bursts into flames.
• Keep saved roaches away from dogs, since a rise in dog poisonings has been tied to joint ends people throw away.
• Leave the joint unlit on federal land such as national forests, where cannabis stays illegal and smoking is banned during fire restrictions.

Relighting a half-smoked joint

So can you relight a joint? Yes, and plenty of people save half a joint for later. It will not taste the same, though. In a 2023 smoking-machine study, cannabinoid content in the inhaled smoke increases as smoking progresses, and the sections nearer the mouth held more cannabinoids than those near the lit end. Monoterpenes, the light aroma compounds, reached the smoke first.

Before you relight, knock off the old ash and toast the charred end the same way you lit it, turning it slowly so it catches evenly. In our experience, a relit joint hits a little harder per puff but tastes flatter, since much of its bright top note went up with the first half. The loss shows most in terpene-forward flower. Tangerine Dream, a G13, Afghan and Neville's A5 Haze cross at 27% THC, has a sweet citrusy terpene profile with orange notes, and it tastes best smoked in one sitting.

If you do save a joint, keep it in a closed tin away from light and heat. Even stored in the dark at room temperature, cannabis lost an average of 16.6% of its THC in a year and 41.4% in four years in a study published by the United Nations Office on Drugs and Crime.

Where you can legally light up

A perfectly lit joint can still earn a ticket in the wrong place. No person shall consume marijuana in a public place or smoke it where smoking tobacco is banned, Massachusetts law says, and a violation carries a civil penalty of up to $100. Michigan’s 2018 law likewise does not authorize consuming cannabis in a public place or smoking in the passenger area of a vehicle on a public way, and Illinois bans using cannabis in any public place or any motor vehicle. Your own home is usually fine, though a landlord can still say no, and Michigan’s law lets a lease ban smoking while protecting other ways of consuming.

A joint lit right, start to finish

A good joint starts with a gentle, even light and a couple of small puffs, then a wait before the next. Canoes and runs need a touch of flame or a damp fingertip, a joint you save needs a careful stub-out, and a relit one hits a little harder with less flavor. Light up at home or in a licensed lounge, and wet the ashes before they go in the trash.

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