Professionals degrease a commercial kitchen by combining four things at once: an alkaline degreaser mixed to the right strength, heat, enough dwell time for the chemistry to work, and physical agitation to lift the grease. Then they rinse, and only after that do they sanitize. That’s the whole method.
The reason a can of store degreaser leaves your walls tacky and the grease back within a week isn’t the product. It’s that one of those four levers gets skipped on the way, and it’s almost always the same one.
Once you can see all four, you can watch anyone clean your kitchen for two minutes and tell whether they’re actually degreasing it or just pushing the grease around. That’s worth knowing before you hand the job to your own crew or a service.
Why grease sticks in the first place
Cooking grease doesn’t just sit on a surface like dust. As it lands warm and cools, it grabs onto the microscopic texture of stainless steel, tile grout, and painted walls. Over hours and days it oxidizes and hardens into a bonded film that ordinary soap and water can’t touch.
Fresh splatter from this morning wipes off easily. The amber, sticky layer that’s been baking near the fryer for a month is a different substance entirely. It has polymerized, which is a fancy way of saying it has cross linked into something closer to a varnish than a liquid.
That’s why alkaline degreasers exist. An alkaline cleaner, usually somewhere around a pH of 10 to 14, does something water can’t: it reacts with the fat and turns it into a soap you can rinse away. That reaction has a name, saponification, and it’s the same chemistry that turns oil into bar soap. The degreaser isn’t dissolving the grease so much as converting it into something that finally lets go.
The four levers professionals pull
Every effective degrease is the same four levers working together. Weaken any one of them and the whole job suffers, which is exactly what happens in most kitchens.
- The right chemistry, mixed right. A true alkaline degreaser, diluted to the label ratio. Too weak and the reaction never really starts. Too strong wastes product, streaks stainless, and can dull finishes. Dilution isn’t a suggestion on the bottle, it’s the setting that makes the chemistry work.
- Heat. Warm water and a warm surface speed the reaction up dramatically. Grease that shrugs off a cold spray gives way when the water is hot. Pros often degrease while equipment is still warm from service for exactly this reason.
- Dwell time. After you apply the degreaser, it needs to sit and react, usually three to ten minutes depending on the product and how heavy the buildup is. This is contact time, and it’s the lever almost everyone skips. Spraying and immediately wiping gives the chemistry no time to convert anything.
- Agitation. Once the grease has emulsified, a brush, a scrub pad, or a scraper physically lifts it off the surface. The chemistry loosens the bond; the muscle removes what it loosened.
Think of it the way a professional does: chemical, heat, time, and action. Turn down any one dial and you’ve got to crank the others to make up for it. Skip one entirely and no amount of scrubbing saves you.
The order pros degrease a commercial kitchen
The sequence matters as much as the ingredients, because working out of order means cleaning the same surface twice.
- Clear and scrape first. Loose debris, food chunks, and heavy carbon get scraped off dry before any chemical goes down. Degreaser is for the film, not the crumbs.
- Work top to bottom. Hoods and high shelves first, then equipment and walls, then the floor last. Grease and dirty water run downhill, so anything you clean before the surface above it just gets re-dirtied.
- Apply, then wait. The degreaser goes on and dwells. This is the pause a rushed cleaner never takes, and it’s where the real work happens.
- Agitate and rinse. Scrub the emulsified grease, then rinse the surface completely with clean water. Rinsing is not optional, and skipping it is why kitchens stay sticky.
- Sanitize separately. Degreasing removes soil. Sanitizing kills the germs the soil was hiding, and it’s a different chemical on a clean surface. On food contact surfaces the FDA Food Code treats these as two distinct steps for a reason.
A crew that understands this order moves through a kitchen once. A crew that doesn’t ends up chasing runoff around the room all night.
Baked on grease behind the equipment is a different job
The film on your prep tables comes off with the routine above. The bonded grease behind the fryer, under the flat top, and along the wall behind the cook line is the job that separates a real degrease from a wipe down.
That grease has had heat and time to harden, so it needs more of both levers back: a stronger dwell, hotter water, and often a scrape before the chemical even goes on. It’s slow, physical work in tight, hot spaces, which is precisely why it gets left undone during a normal shift. This is the hidden buildup we cover in where restaurant grease hides behind and under equipment, and it’s the same grease that drives up kitchen fire risk when it’s allowed to accumulate.
One honest line about scope. The greasy surfaces, the cook line, the walls, the floors, and behind the equipment are all fair game for a cleaning service, and that split between nightly crew work and professional degreasing is laid out in cleaning the cook line.
The inside of the exhaust hood and the ductwork above it are not. That interior is a fire safety job governed by NFPA 96, and it belongs to a certified exhaust cleaning specialist, not a general degrease. A good cleaner degreases everything up to that line and tells you plainly where the line is.
Why the grease keeps coming back
Here’s what’s happening when your walls feel sticky a day after they were “cleaned.” It isn’t new grease. It’s degreaser that was never rinsed off.
Alkaline degreaser left on a surface stays slightly tacky, and that tacky film grabs airborne grease and dust out of the kitchen air almost immediately. So the surface looks clean on Monday and feels sticky by Wednesday, and everyone blames the product. The product did its job. The rinse didn’t happen.
The other culprit is the lever from earlier: no dwell time. When someone sprays and wipes in one motion, the chemistry never converts the grease, so a thin greasy layer stays behind and rebuilds fast. Give it the three to ten minutes it needs, rinse it fully, and the surface stays clean for weeks instead of days. The grease coming back is not bad luck. It’s a receipt for a step that got skipped.
Doing it yourself vs calling a service
Your own team can and should handle the daily degreasing: the cook line surfaces, the prep tables, the reachable walls, wiped down with a proper degreaser every night using all four levers. That keeps the buildup from ever getting a head start.
The periodic deep degrease is the one worth handing off. If your kitchen runs high volume, if you’ve noticed sticky walls or amber buildup in the corners, or if nobody has cleaned behind the line in months, that’s the point to bring in a service.
A professional crew brings the hot water, the commercial chemistry, the time, and the willingness to move the equipment and get behind it, which is exactly the combination a busy shift never has. You can see how that periodic work fits alongside your daily routine in what a professional restaurant cleaning service actually does.
The test is simple, and it’s the same four levers you started with. Is someone using the right degreaser, hot, with real dwell time, and real scrubbing, then rinsing it off? If yes, your kitchen will stay clean. If any one of those is missing, the grease is coming back, and now you know exactly which lever to go looking for.
If you run a restaurant in the Wilkes Barre, Scranton, or Kingston area and the buildup has gotten ahead of your crew, Excellence Janitorial Services can handle the deep degrease so your team can focus on the nightly upkeep.
Frequently asked questions
Why does grease keep coming back on my kitchen walls?
Almost always because the degreaser wasn’t fully rinsed off. Alkaline degreaser left on the surface stays tacky and grabs new grease and dust within a day or two. Rinse every degreased surface with clean water, and make sure the cleaner got real dwell time before it was wiped, or a thin greasy layer rebuilds fast.
What is the best degreaser for a commercial kitchen?
An alkaline degreaser designed for commercial kitchens, mixed to the label dilution. The specific brand matters less than using a genuine alkaline product, diluting it correctly, and giving it heat and dwell time. A premium degreaser used wrong still leaves grease behind.
Does dwell time really matter, or can I just spray and wipe?
It matters more than almost anything else. The chemistry that breaks grease needs three to ten minutes of contact to work. Spraying and immediately wiping gives it no time to convert the grease, so you smear it rather than remove it. The pause is the part that actually cleans.
Is a degreaser the same as a sanitizer?
No. A degreaser removes grease and soil. A sanitizer kills bacteria on an already clean surface. They’re two separate steps with two separate products, and on food contact surfaces you degrease first, rinse, then sanitize. One doesn’t replace the other.
How do professionals remove baked on grease from stainless steel?
They scrape off the heavy carbon dry, apply an alkaline degreaser, let it dwell longer than usual, often with hot water, then agitate with a non scratch pad and rinse. Baked on grease has hardened, so it takes more heat, more time, and more physical work than fresh splatter. They avoid harsh abrasives that scratch the steel.
Can I use bleach to degrease a kitchen?
Bleach is a sanitizer and a whitener, not a degreaser. It doesn’t break down grease, and mixing it with other cleaners can create dangerous fumes. Use a dedicated alkaline degreaser to remove the grease, rinse, then sanitize as a separate step if needed.
How often should a commercial kitchen be degreased?
Daily for the reachable surfaces your staff handle, and a deeper degrease behind and under the equipment on a schedule that matches your cooking volume. A high volume fryer heavy kitchen builds bonded grease far faster than a low volume one, so the right interval depends on how hard your line runs.