The cooking line — ranges, griddles, fryers, grills and the hood above them — is where a restaurant's grease problem lives. It is also where cleaning decisions usually go wrong, because most kitchens ask about cleaning one piece of equipment at a time, while the line behaves as a single unit: a row of adjacent machines, shared overhead surfaces, narrow gaps and a floor strip that all have to be released back into service together. Whether you plan to hire a cleaning contractor or buy your own commercial cooking equipment degreasing machine, the result depends on the questions you ask first. This guide groups those questions into three sets: what to settle inside your own kitchen, what to put to the contractor or equipment supplier, and how to verify that the whole line — not just the visible fronts — came back clean.
Start by defining what "the line" actually includes
Walk the line with a notepad at closing time, after the nightly routine is finished and before anything deeper is attempted. Write down every unit and every surface between them: griddles, ranges, fryers, grills, ovens, steamers; the hood face, filters and the first section of duct you can reach; the gaps between units; the strip behind the line; the undersides of overhangs, shelves and guard rails; control panels, legs and kick plates. Most disputes over line cleaning start because nobody wrote this list down.
Then answer four questions inside your own team before contacting anyone:
- What does the nightly routine already cover, and where does grease survive it? This separates daily work from periodic work, so you are not paying a contractor or buying a machine to redo what your staff already do well.
- What state is the grease in? A fresh oil film wipes off with detergent and warm water. Sticky, polymerised deposits need heat and dwell time. Thick sludge needs mechanical removal before any method is applied. Be honest — this answer changes the method and the price.
- When is the line actually stopped, in minutes? "At night" is not an answer. "Tuesday after close, 10:40 p.m. to 1:00 a.m., two staff available" is.
- What do your health inspector or brand audit actually check? Handles, seams, filter condition, the area behind equipment. Know the standard the cleaned line has to pass.
A vendor who does not know the soil condition cannot recommend a method, and a supplier who does not know your real time window cannot size a machine that finishes the job inside it.
Questions to put to a cleaning contractor or equipment supplier
Take the same list to whoever you are talking to. These six questions separate a line-level plan from a machine-level promise.
1. What exactly is included in "line cleaning"? Ask for the scope item by item against your own list: gaps between units, the strip behind the line, undersides of overhangs, legs and guard rails, hood exterior and reachable duct, filters. Anything not written on the list will not get cleaned.
2. What is the work sequence, and how long per unit? A line is cleaned top to bottom, with dry removal before any wet work. Ask for a per-unit time estimate rather than one number for the whole job — that is how you find out whether the plan fits inside your real window.
3. What method, and why that method? For fresh film, detergent and warm water are usually enough. For polymerised grease, ask what heat and dwell time are used and how the team avoids flooding the area. For serious restaurant kitchen heavy grease removal, ask what gets scraped off first and what the heat is expected to do on its own.
4. What do you need from my kitchen on the day? Circuit locations and capacity, water access, where rinse water drains (floor drain and interceptor), ventilation while filters are out, and clearance through the back door for equipment. A competent vendor asks these before quoting, not after arriving.
5. What is not included? Duct interiors beyond the reachable section, the oil circuits and plumbing of fryers, the grease interceptor and the exhaust fan are separate trades. Get them scheduled separately so nobody assumes the other side did it.
6. If I buy equipment: what are the machine's real limits? Ask how long the machine runs on one fill of water — this decides whether one person can finish the line in a single pass — what the lance and hose actually reach across the line, whether the machine switches between a low-moisture mode for the area around controls and electrical parts and a wetter pass for rinsing, and what protections it carries.
How to read an equipment data sheet for line work
A data sheet answers the questions above if you know what to look for. The PowerDe HW02 fixed steam cleaning machine page, for example, lists a 160 °C steam temperature and 0.8 MPa vapour pressure. Heat at that level is what softens polymerised grease so it can be wiped off instead of scraped at for an hour. The 80 L stainless tank and 6 kW heating element on a 220 V supply tell you how long the machine works between refills and what your electrician needs to confirm at the chosen point. The dry/wet steam switch matters in a kitchen specifically: drier steam around control panels and electrical parts leaves far less condensation behind, while a wetter pass finishes the rinse on open surfaces. The page also lists leakage, short-circuit, high-temperature, high-voltage and water-shortage protection — those protect the machine, and they do not replace your own pre-start checks.
One caution: the HW02 product page describes vehicle exterior and engine-compartment cleaning. Before ordering for a cooking line, confirm the intended kitchen surfaces and duty pattern with the manufacturer in writing.
Questions about verification and records
Agree on how the result will be judged before anyone touches a machine.
- How will we both know the line is clean? Use checks that give the same answer for any two people: rake light across stainless fronts and sides, where grease shows as a dull film; wipe edges, handles and seams with a white cloth; photograph the same fixed reference points before and after; lift floor drain covers and look behind the units.
- Who signs off, and how? Sign off zone by zone — hood, each unit, gaps, floor strip — not one tick for "line done".
- What records will an audit ask for, and can you provide them? Dated before-and-after photos, the method used, and the time spent. Cleaning without records is worth less to your audit file than the same cleaning with them.
Run one line as a pilot before you commit
Whether you are hiring or buying, test on one line before the whole kitchen. Pick the dirtiest line you can stop for a few hours. Photograph the reference points, time the work, and check again the next morning when the line runs hot — grease returns first at edges and handles, so a next-morning check tells you more than an immediate one ever will.
Record five things during the pilot: actual elapsed time; areas the plan missed; moisture left around controls and electrical parts; the effort required from staff or the contractor's crew; and the result against the agreed checks. Then decide line by line. A method that works on a griddle-and-fryer line may need different settings on a charbroiler line, and the pilot record is what turns that difference into a decision instead of an argument.
Turning the questions into a decision
Cleaning a commercial cooking line well is mostly a matter of asking line-level questions before anyone touches a machine: what the line includes, what the soil actually is, what the real time window is, what the other side includes and excludes, and how both sides will prove the result. If you are evaluating equipment for your line, send your surface list, soil description and available window to PowerDe's team through the contact page, and ask for written answers to each of the questions above before comparing offers.
