How to Clean a Pellet Grill in 30 Minutes, Every 20 Hours

Thirty minutes with a shop vac every 20 hours of cooking keeps a pellet grill lighting on the first try and holding its temperature. The grill has to be cold and unplugged; then you pull the grates, drip tray and heat baffle, vacuum the fire pot and barrel, deal with the grease, wipe the sensor and vacuum the bottom of the hopper.

Twenty hours is about two briskets or three weekends of ribs and chicken, and it’s the interval Traeger’s support pages recommend. Of all our pellet grill guides for owners, this is the one I wish came taped to the lid of every new grill. Below is the regular clean, the deeper one worth doing twice a season, how to put a grill away for winter, and the habits that cause the breakdowns in the first place.

How often to clean each part

Task	How often	Why it matters
Scrape grates	Every cook, while still warm	Baked-on food comes off in seconds hot, minutes cold
Check grease bucket	Every long cook	An overflowing bucket drips onto the deck and attracts animals
Vacuum fire pot and barrel	Every 20 hours	Ash smothers the fire and causes low-temp shutdowns
Re-line or scrape drip tray	Every 20 hours	Old grease on the tray is the fuel for a grease fire
Wipe temperature sensor	Every 20 hours	A greasy sensor reads low and the grill runs hot
Vacuum hopper floor	Every 20 hours	Sawdust doesn’t burn and chokes the fire pot
Scrape lid, clean chimney, vacuum fan	Twice a season	Flakes land on food; a dusty fan runs slow

Hickory and mesquite leave more ash than fruitwood or alder, so shorten the interval if that’s what you burn. If you cook in a dusty yard or keep the grill in a garage with sawdust around, the hopper floor needs attention more often.

What you need

A shop vac (a small 2 to 4 gallon one is plenty), a plastic putty knife or the scraper from a cleaning kit, heavy-duty foil or the drip tray liners sold for your model, paper towels, a bucket of warm water with a squirt of dish soap, and nitrile gloves. The Pit Boss cleaning kit was about $14 in October 2026 and covers the scraper and brush. The rest of what’s worth owning is on the pellet grill accessories page.

The 20-hour clean, step by step

1. Let it go cold, then unplug it. Wait until the shutdown cycle has finished and the barrel is cool to the touch, at least an hour after the cook. A shop vac pulling a live ember out of a warm fire pot is how garage fires start.
2. Lift out the grates. If you didn’t scrape them warm after the last cook, use a grill brush or a ball of foil held in tongs, and drop the stubborn ones in the soapy bucket while you work inside.
3. Remove the drip tray and heat baffle. Pit Boss calls the lower plate a flame broiler plate; Traeger calls it the heat baffle. Note which way each piece faces before it comes out.
4. Deal with the drip tray. Peel off the old liner or foil and scrape any grease that got underneath. On a bare tray, scrape it down with the putty knife and vacuum the scrapings. Avoid washing it in soapy water unless you plan to re-season it, since that thin film of baked grease is what keeps bare steel from rusting.
5. Vacuum the fire pot. This is the step that keeps the grill running. Get every bit of ash out of the cup and out of the air holes in its sides, then vacuum the barrel floor around it. Expect 20 hours of cooking to leave the pot about a third full of fine gray ash.
6. Look at the hot rod. With the pot clear, check the igniter tip poking in from the side. It should be clean and stick out about a quarter inch. Brush packed ash off it with a dry brush, since ash against the tip is a common reason a grill fails to light.
7. Wipe the temperature sensor. It’s the thin metal rod on the back or side wall. A damp paper towel takes the grease off; make sure it’s straight and not touching the wall.
8. Empty the grease bucket and clear the drain. A foil liner in the bucket turns this into a lift and toss. Run the putty knife down the drain channel and poke through the drain hole so grease reaches the bucket instead of the barrel floor.
9. Vacuum the hopper floor. Scoop out the pellets or burn them down on the next cook if they’re fresh, then vacuum the sawdust from the bottom and from around the auger opening.
10. Reassemble in order. Heat baffle, drip tray with a fresh liner pressed flat, then grates. A liner that bunches up can block airflow around the fire pot and cause a low-temperature error on the next cook.
11. Wipe the outside. Warm soapy water on the lid and barrel, then dry it with a towel. No oven cleaner, no abrasive pads on powder coat.

Pit tip: Line the grease bucket and the drip tray with foil before every long cook. It turns the messiest two steps of this routine into peeling off a sheet and throwing it away.

The twice-a-season deep clean

Do everything above, then go further. Scrape the inside of the lid with the putty knife, since the black buildup starts flaking after a few months and lands on food. Take off the chimney cap and clean the pipe, and on a Traeger reset the gap between cap and pipe to about a thumb’s width.

Remove the hopper’s bottom service panel and vacuum the fan blades. A fan caked in dust and grease spins slower and eventually squeals. While you’re in there, check the lid gasket and the hopper lid seal, and inspect the drip tray for rust holes rather than surface rust. A hole in the tray drops grease straight onto the fire pot.

Putting a pellet grill away for winter

If you stop cooking for the season, empty the hopper completely and run the auger until no more pellets drop. Vacuum everything, let the grill dry fully, and put it under a pellet grill cover that fits. Store the leftover pellets indoors in a sealed bucket. If you cook through winter, the 20-hour schedule stays the same, but check the hopper for condensation after cold, damp nights, because pellets that soak up that moisture swell overnight and are a common start to an auger jam.

Habits that cause the next breakdown

Running cook after cook on a full fire pot is the big one. Each cook adds ash, and a grill that has thrown one low-temperature error will keep throwing them until the pot is vacuumed.

Water inside the barrel causes slower damage. Hosing out a pellet grill rusts the fire pot and the tray and turns the sawdust in the auger tube into a solid plug. Inside, clean it dry.

Covering a warm grill melts the cover at the chimney in minutes, and a damp cover over a warm barrel traps moisture against the steel. Wait until it’s fully cold.

Leaving pellets in the hopper through a rainy month is the expensive one. They swell, the auger seizes, and clearing it means a wrench, a couple of hours and a lot of patience.

Watch out: If you see grease pooled on the barrel floor or burning on the drip tray, shut the grill down and keep the lid closed. Opening it feeds the fire air. Clean it once it’s cold, and don’t restart until the drain is clear.

When cleaning doesn’t fix it

A clean grill that still won’t hold temperature points to a part rather than to dirt. Listen for the fan’s hum, watch for pellets dropping into the pot at startup, and hold a hand over the pot to feel the hot rod. The how a pellet grill works page explains what each of those parts should be doing, and the Traeger error codes page walks through the low and high temperature shutdowns that a dirty grill causes most often.