End-of-Season Maintenance That Prevents Spring Problems

Grills do not fail because they are old. They fail because ash, grease, and moisture are left in them for six months. A two-hour session at the end of the season prevents almost every spring problem: seized vents, uneven flames, flame-outs, and rust holes that could have been a wire-brush job.

Kettle and charcoal grills

1. Empty and scrub the bowl completely. Ash is mildly alkaline and holds moisture against the enamel. A plastic scraper and warm soapy water is all the enamel needs — no metal tools on the inside curve.
2. Free the vents. The one-way sweep and the bottom vents seize on ash residue. Work them back and forth, then wipe.
3. Inspect the grate. Rust that will not brush off means replacement. A stainless or cast-iron grate is the cheapest meaningful upgrade.
4. Check the legs and wheels for wobble, and the ash catcher for cracks. A tip-over is the most dangerous failure a kettle has.
5. Store indoors or covered with the vents closed, so water cannot pool inside.

Gas grills

1. Burn off residue on high for 15 minutes, then brush the grates while warm.
2. Remove and soak the heat plates or flavoriser bars in degreaser. Clogged plates are the number one cause of uneven cooking.
3. Inspect burners for blocked ports and rust. Clear ports with a pin, not a drill bit. Replace any burner with a cracked body.
4. Clean the grease tray and the drip pan, then replace the liner. Old grease is a fire waiting for a hot day.
5. Leak-test the connections with soapy water after reattaching the tank. Bubbles mean a leak — never test with a flame.
6. Cover the grill once it is fully cool and dry. Covering a damp grill traps moisture and accelerates rust.

Pellet grills

1. Vacuum the fire pot and the auger tube. Ash buildup here causes flame-outs and temperature swings more than any other cause.
2. Empty the hopper if you are storing the grill for months. Pellets absorb humidity and swell, jamming the auger.
3. Clean the temperature probe with a cloth and mild soap. A coated probe reads low, and a low-reading probe means an overcooked brisket.
4. Grease management: empty the bucket, clean the drip channel, and check the foil on the deflector.

Fuel storage

Charcoal: keep briquettes in a sealed bin off concrete, which wicks moisture. Damp briquettes will not light and smell of chemicals when they finally do.

Pellets: sealed bins or the original bag clipped shut. Never leave pellets in the hopper over a humid summer.

Propane: store upright, outdoors or in a ventilated space, never in a basement or a car. Check the certification date on the tank; many require recertification after 12 years.