Commercial kitchen deep cleaning
The worktop you wipe a hundred times a day sits under the surfaces nobody wipes at all. Grease rises - and a deep clean has to follow it up there.
Short answer
Fryers and ranges throw a fine grease aerosol into the air. It rises, settles above eye level and bakes onto walls, ceilings and light fittings - exactly where a daily routine never looks. High-level surfaces are part of the condition an EHO scores, and a deep clean has to reach them.
Most daily cleaning happens between knee and shoulder height, because that is where food is handled. But cooking does not keep its mess at that height. Frying and grilling vaporise fats and oils, which drift upward on the heat, condense on cooler surfaces overhead and harden into a sticky, then carbonised, film. Over weeks and months that film builds on ceiling tiles, wall cladding, extract canopy exteriors, pipework and the housings of light fittings - all the places a busy team never has cause to touch.
High-level grease is a contamination route. A greasy ceiling above a prep bench can shed condensate or debris onto food and clean surfaces below. It holds soil that feeds pests and odour. Left long enough, the film softens in the heat and can drip - both a contamination route onto the food below and a slip hazard on the floor. And it counts against you on inspection: the structure and condition element of a hygiene assessment looks at walls, ceilings and finishes, not only the worktops. Inspectors checking how clean a kitchen really is will look up - a gleaming bench under a tar-stained ceiling tells its own story, and is a clear sign of the things that quietly drag a score down.
Reaching ceilings and high walls needs access equipment, the right degreasers and time for those products to work - none of which fits around a live shift. It is genuinely a deep-clean task: surfaces are degreased from the top down, given the two-stage clean where they are food-adjacent, and finished before the lower surfaces are touched so nothing recontaminates a cleaned bench. This is also why a deep clean is sequenced the way it is, working surface by surface from the ceiling down.
Walls and ceilings matter as much as worktops because the worktop you wipe a hundred times a day sits underneath the surfaces nobody wipes at all. A deep clean resets that high-level condition - but, as ever, it is necessary rather than sufficient: it cannot repair flaking paint, failing tiles or damaged cladding, which need fixing as fabric, not just cleaning. For the build-up you cannot see at all, see the hidden grease traps a daily wipe never reaches.
Questions
Frying and grilling vaporise fats into a fine aerosol that rises on the heat, condenses on cooler surfaces overhead and hardens into a film. Given time it carbonises onto ceiling tiles, cladding, pipework and light housings.
Yes. The structure and condition element of a hygiene assessment covers walls, ceilings and finishes, not just food-contact surfaces. Visibly greasy or damaged high-level surfaces count against the score.
High-level work needs access equipment, suitable degreasers and dwell time for them to work, which does not fit around a live service. It is a planned deep-clean task, done top-down so loosened soil does not fall on cleaned surfaces.
It can. A greasy ceiling above a prep area can shed condensate or debris onto food and clean surfaces below, and the build-up holds soil that attracts pests and odour, so it is a genuine contamination route.
No. A deep clean removes grease and soil but cannot repair flaking paint, failing tiles or damaged cladding. Worn fabric needs repairing as well as cleaning - the clean resets condition, it does not rebuild it.
Phoenix Duct Clean · by the numbers
Phoenix degreases high-level surfaces as part of a full kitchen deep clean - ceilings, cladding and fittings included. Quoted on survey, certificated on completion.