Write down which cooking-equipment surfaces staff may never spray
Overspray stops being an accident only when the boundary is written before the lance moves. Walk the line of cooking equipment and list, for each unit, the openings and fittings that must stay dry: electrical enclosures, control panels and their gaskets, thermostats, gas train components where gas is present, bearings and shaft seals, door hinges and the insulation behind a panel edge, and any vent or cable gland that faces the aisle. Put that list on one page, name the person responsible for each item, and keep it at the wash point. Staff cannot hold a boundary in their heads while also watching a jet, so the list is the control.
For every item on the exclusion list, give staff the fallback instead of a prohibition alone. A panel face that must not be sprayed is wiped with a damp cloth and a brush; a switch housing is cleaned dry with a brush and a vacuum nozzle; a hinge is wiped after the surrounding panel is cleaned, not during it. A rule without a fallback is quietly ignored the first time the kitchen is behind schedule.
Set the working distance once, on your own equipment, and write it into the procedure
Distance is the single variable staff control most often and understand least. Held too far from a stainless panel, the jet loses contact and the operator answers by sweeping the lance through a wide arc, which is precisely how overspray is produced. Held too close to a surface with a seam, a decal or a trimmed edge, the same jet forces water and softened grease behind that edge. Neither distance is a number anyone should guess at, and neither can be copied from another site.
Establish it with one bounded trial on the least critical cooking-equipment unit in the kitchen. Spray a small test area at a distance the operator is comfortable with, step back, and look at what has actually changed: is the grease lifting, is the surrounding frame wet, is there run-off outside the test area. Adjust once, repeat, then record the distance and the pass pattern that worked and add both to the written procedure. That single number becomes the thing a new starter can be shown on their first shift.
Choose the mode per surface so the deposit is collected, not redistributed
A cloud kitchen carries at least three different deposits on its cooking equipment, and they should not all be treated the same way. Light, fresh oil film on a flat outer panel needs little water; a baked-on crust on a splash-back around a range needs the deposit softened before it can be lifted; grease that has migrated into a joint or a channel needs to be flushed toward a collection point rather than pushed along the seam. Deciding mode and technique per surface, in writing, is what stops the operator from answering every problem with one setting and one long sweep.
The trade-off has to be stated honestly to staff. Drier settings put less water on the surface, which means less run-off and therefore less overspray, but they act more slowly on a thick deposit, so the temptation is to pass over the same area repeatedly. Work the deposit with a brush after it has been softened, then collect, rather than going over the same panel again with the jet. Where the unit is one of the central kitchen cleaning equipment duties that sit closest to the cooking line, ask the supplier which of the published modes is intended for the deposits you actually have, and have the answer in writing.
Point the plume away from the next unit in the line
In a cloud kitchen the neighbouring surface is always close, so the direction the plume travels matters as much as the distance. Clean from the far end of the line toward the near end, so that anything displaced falls behind the operator instead of onto a unit that has just been finished. Keep the jet facing the surface being worked and shield the adjacent face with a board or a removable panel where the layout allows it. Where a unit faces an aisle, clean it last, and treat the aisle itself as part of the work area rather than as something that stays dry by luck.
Give the technique a name on the procedure so it can be taught: short passes, jet facing the target, one area at a time, collect before moving on. An operator who has been told to "be careful" will spray widely; an operator who has been shown a pass pattern will not.
Plan the wash point and the run-off route before the shift
Most overspray damage in a kitchen is a layout problem. Decide before the work starts where the machine sits, how far the hose reaches without being dragged across a cooking-equipment face, where displaced grease and water are collected, and which floor route is wet until it dries. Mark the collection point, and name the person who closes the wet work with a dry pass, because a wet floor and a wet panel edge are how the cleaned area is contaminated again an hour later.
Timing does the rest. Cleaning the surfaces around a range while the line next to it is running moves grease and condensate onto a working station. Split the list into what can be done during a quiet window and what needs the line down, and put both against the kitchen's own schedule rather than against a general rule about how long cleaning should take.
Train the staff, then check the result, not the effort
Put the exclusion list, the tested distance, the per-surface mode choice and the pass pattern on one page, and train it at the equipment rather than in an office. Then check the outcome the next day with a short walk: a control panel face that is wet, an adjacent frame with a fresh grease line on it, a floor channel that has been loaded with run-off, or a joint behind a panel edge that has darkened since last month. Each of those is overspray you can see without any measurement.
Ask the same question at every walk-round: which surface did the jet miss its target on, and was that because the distance was wrong, the mode was wrong, the plume faced the wrong way, or the item should have been on the exclusion list in the first place. The answer changes the written page, which is the only place a correction survives staff turnover.
When the routine needs different equipment rather than different technique
If overspray persists after distance, mode, direction and shielding are all being followed, the limit is usually the machine and the layout, not the staff. A unit that cannot be sited close enough to the cooking line means a hose dragged across other equipment; a machine that stays wet on a surface the kitchen needs dry means staff compensating with a second pass. Take those two facts to the supplier together with your surface list and the time window you actually have, and ask for the configuration rather than a catalogue model. Central kitchen degreasing is worth describing in that enquiry in your own words, because the deposits you list are what determine whether a mode choice will help at all.
Before any purchase, ask for a trial against your own equipment and agree in writing what counts as a pass: which surfaces, which deposit, which result after the dry pass, and what stops the trial. A supplier who will run that test is telling you something about the equipment that no specification sheet does. A customized steam cleaning equipment enquiry sent with your exclusion list, your tested distance and your time window attached will come back with a usable answer; the same enquiry sent as a request for a brochure will not.
