Creosote is condensed smoke, so the entire prevention game reduces to one sentence: make less smoke, and keep it hot until it exits. Every tip below is that sentence wearing different clothes.
Habit 1: burn wood that’s actually seasoned
The single biggest lever. Freshly cut oak is roughly half water by weight; boiling that water steals combustion heat, cools the exhaust, and produces thick smoke, the perfect creosote recipe. Seasoned means split, stacked off the ground, covered on top, and dried 9-12 months for our local oak and pecan. It should feel light, show cracked ends, and clack rather than thud. A $15 moisture meter settles arguments: burn under 20%.
Habit 2: burn hot and bright, not slow and smoldering
The overnight smolder, damped down, barely flaming, is a creosote factory: cool, smoky exhaust crawling up the flue for eight hours. Smaller, hotter, flame-visible fires burn the smoke compounds instead of exporting them. If you routinely need all-night heat from wood, that’s the use case where a modern insert genuinely shines, sealed combustion burns the smoke a fireplace wastes.
Habit 3: warm the flue before the main event
A cold flue condenses the first twenty minutes of smoke on contact. Light a top-down fire or hold a lit newspaper torch near the damper for a minute first, once draft reverses and pulls strongly, load the real fuel. Exterior chimneys, common in DFW, run colder and benefit most.
Habit 4: give the fire its air
Glass doors shut tight on a starving fire, or a damper half-closed to “slow things down”, both trade clean combustion for smoke. Open the air, let it burn like it means it.
The verification loop
Habits set the rate; the annual inspection measures it. Good habits typically show up as stage-1-only findings year after year, and cheaper visits accordingly. Book the measurement and see what your burning style is really producing.