How to Clean a Flat Top Grill: Commercial Griddle Scraping, Seasoning, and Inspection Rules

To clean a flat top grill, you scrape it between orders during service, then at the end of the day scrape it while it is still warm, apply a griddle cleaner or water to lift the carbon, scrub with a griddle screen or pad, wipe and rinse until no residue is left, dry it, and coat it with a thin layer of oil. The FDA Food Code expects the food-contact surface of cooking equipment to be cleaned at least every 24 hours.

Most advice online is written for backyard griddles that get used on weekends. A commercial flat top is a different machine with a different job. It runs for ten or twelve hours, it cooks raw meat, eggs, pancakes and allergens on the same steel, and an inspector will look at it. The cleaning routine has to keep food from sticking, keep the plate from rusting, and stop grit, cleaner residue and allergen proteins from ending up in the next order. That last part is what home guides skip.

What does the FDA Food Code require for a flat top grill?

The Food Code has no griddle-specific procedure. A few general equipment rules in Chapter 4 set the standard, and your state's adopted version is the one that applies to you.

The Food Code's own reasoning explains why the rule exists. Encrusted deposits interfere with the heat transfer needed to cook food properly, and soiled equipment attracts pests when the kitchen is closed. Our concept page on the FDA Food Code explains how each state adopts and amends the model code, so confirm the wording with your health department.

How do you clean a flat top grill during service?

During a shift, the goal is control, not a deep clean. You are keeping carbon and old food from building up and transferring flavors, proteins and burnt bits into the next order.

1. Scrape after each batch. Use a flat griddle scraper held at a low angle and push debris into the grease trough. Do not gouge the plate.
2. Keep the trough from overflowing. Empty the grease drawer or trough as needed so grease does not spill onto the line and the floor.
3. Clean between allergen and non-allergen items. If you cook a guest's order to avoid an allergen, scrape and clean the area of the plate you will use, or use a separate pan. Scraping alone does not reliably remove proteins from egg, milk, shellfish or other allergens. Our page on food allergens and cross-contact covers the controls.
4. Wipe the edges and splash guard. Use a clean cloth stored in sanitizer solution between uses, so grease does not bake onto the sides.

A good line cook scrapes the flat top constantly. That habit is what makes the end-of-day clean a 15-minute job instead of an hour of fighting carbon.

How do you clean a commercial flat top at the end of the day?

Every griddle is different, and the manufacturer's manual for yours overrides this outline. The general sequence for a steel plate looks like this.

1. Turn the heat down, not off. Most griddle cleaners and the water method work best on a warm plate. Follow the cleaner label and the manual for the right temperature.
2. Scrape the whole surface. Push loose carbon and food into the trough.
3. Apply the cleaner. Use a griddle cleaner approved by the manufacturer, at the strength on the label. Some kitchens use only water poured on the warm plate to lift residue, which avoids chemicals altogether.
4. Scrub with a griddle screen or pad. Use the holder and pad the manufacturer recommends. Work in the direction of the grain and pay attention to the corners and the back edge where carbon builds.
5. Squeegee or scrape the loosened residue into the trough.
6. Rinse until nothing is left. Pour clean water over the plate and wipe it off, more than once if needed, until no cleaner, grit or carbon remains.
7. Dry it and oil it. Wipe the plate dry, then spread a thin film of cooking oil to protect the steel from moisture and rust.
8. Clean the trough, drawer, splash guards and front. Empty and wash the grease drawer, and wipe down every nonfood-contact surface.
9. Record it. Put the task on your master cleaning schedule with a name next to it.

Removable parts like the grease drawer and scrapers go to the dish area to be washed, rinsed and sanitized. Our concept pages on cleaning versus sanitizing and building a cleaning program explain how to set that up.

Should you use a grill brick, chemicals, or plain water?

All three are used in commercial kitchens. The right choice depends on your griddle's surface, and the manual is the deciding document.

Two cautions apply no matter which you pick.

Chemicals and grit are contaminants. Cleaner left on a cooking surface becomes a chemical hazard in the next order, and loose brick grit or pieces of a worn screen are physical hazards. Rinse and wipe until the plate is clean to the touch. Our page on chemical and physical contaminants explains why both count.

Not every surface is plain steel. Chrome-plated and some coated griddle plates can be damaged by abrasive bricks, stones and scouring pads. If your unit has one of these surfaces, follow the manual exactly, because damage to the finish usually cannot be repaired.

How do you clean rust off a flat top grill?

Rust on a commercial flat top usually means the plate was left wet or without oil, or that it sat unused. Light surface rust can usually be removed by heating the plate, scrubbing with a griddle screen or pad and oil, wiping it clean, and then reseasoning. Heavy, flaking rust or pitting is a different problem. A rough, pitted cooking surface is hard to clean and may no longer meet the Food Code's expectation that food-contact surfaces are smooth and easily cleanable. That is a conversation with your equipment service company.

Prevention is simple: dry the plate completely after every clean and leave a thin film of oil on it.

How do you season a flat top grill?

Seasoning is a thin layer of oil baked onto bare steel so food releases and the plate resists rust. A new steel griddle is usually seasoned before first use, and you reseason after a heavy clean that strips the surface back to bare metal. The usual method is to heat the plate, wipe on a very thin layer of high smoke point oil, let it smoke off, and repeat a few times. Follow the manufacturer's instructions for your model. Chrome and some coated plates are not seasoned the same way, or at all.

What do health inspectors look for on a flat top?

• Carbon buildup along the back edge, corners and splash guards.
• A full or overflowing grease trough and grease running down the front of the unit.
• Grease on the wall, hood and floor around the cook line, which is both a sanitation and a pest issue.
• Cleaning chemicals stored on or next to the line without labels, or near food.
• Cloths for wiping that are not stored in sanitizer solution between uses.

For how inspectors categorize what they find, see our concept page on regulatory inspections and our guide on how to prepare your kitchen for a health inspection.

What this means for you

If you are a manager or operator, the flat top needs two routines with two owners: constant scraping during service, and a full clean at least every 24 hours. Put the end-of-day clean on your master cleaning schedule, keep the manual and the approved cleaner where closers can find them, and check the plate in the morning. A carbon-crusted griddle at open tells you the closing clean is not happening.

If you are a cook, scrape after every batch, empty the trough before it overflows, rinse until the plate is free of cleaner, and never leave the steel wet.

If you are studying for an exam, remember three things. Cooking equipment must be free of encrusted grease. Chemical and physical residue left on a surface are contaminants. Cleaning removes soil and comes before sanitizing.

Frequently asked questions

How often should you clean a commercial flat top grill?

Scrape it continuously during service, after each batch. The FDA Food Code requires food-contact surfaces of cooking equipment to be cleaned at least every 24 hours, so a full end-of-day clean is the minimum. Busy kitchens often add a mid-shift clean. Your state's adopted code and the manufacturer's manual set the exact standard.

Can you use soap on a flat top grill?

On a commercial steel griddle, most manufacturers recommend water, a griddle screen, and their approved griddle cleaner rather than dish soap, because soap can strip seasoning and leave residue. Whatever you use, rinse until nothing remains on the cooking surface. Removable parts like the grease drawer go through the dish station.

What is the best way to clean a flat top grill without chemicals?

Heat the plate, scrape it, then pour water onto the warm surface to steam off residue. Scrub with a griddle screen or pad, squeegee the dirty water into the trough, and wipe the plate dry. Finish with a thin coat of oil. It is slower on heavy carbon but avoids any chemical residue.

Why do cooks put onion on the grill?

Some cooks rub a cut onion over a hot grill or griddle to loosen stuck residue, and the moisture and acidity help a little. It is not a cleaning method for a commercial kitchen. It does not remove carbon the way scraping and a proper cleaner do, and it does not replace the end-of-day clean.

Do you sanitize a flat top grill?

The Food Code treats the griddle plate as a food-contact surface of cooking equipment, and its key rule is cleaning at least every 24 hours. Removable parts, scrapers and utensils are washed, rinsed and sanitized in the dish area. Ask your local health department how they expect the cooking surface itself to be handled.

What oil is best for seasoning a flat top?

Use an oil with a high smoke point, applied in very thin layers and heated until it smokes off. Many kitchens use the same neutral cooking oil they already stock. The manufacturer's instructions for your model come first, because chrome and coated plates are not seasoned the way bare steel is.

Studying for the manager exam? Test what you know about cleaning, sanitizing and equipment with our ServSafe Manager practice test. For the other greasy job on the line, see how to clean a deep fryer.

Sources

• FDA Food Code 2022 (full text, PDF), sections 4-601.11 and 4-602.12 and the Annex 3 reasons for them
• FDA Food Code overview and editions
• FDA: Food Allergies, the major food allergens and cross-contact
• OSHA: Young Worker Safety in Restaurants, Cooking, burn hazards from hot cooking surfaces and grease
• ServSafe, the training program whose manager exam covers cleaning and sanitizing equipment