The items that fall between categories
A water cooler is a good example. Wiping the exterior and the drip tray is straightforward and belongs in routine work. Changing a bottle involves lifting and a hygiene step around the neck of the bottle; sanitising the dispenser internally is a service task performed by the cooler supplier. Three different parties can reasonably own those three tasks, and unless the scope says which, none of them happens reliably.
Indoor plants are similar. Dusting leaves and wiping a pot exterior is cleaning. Watering, feeding, rotating and replacing plants is a plant maintenance service, and over-watering by a well-meaning cleaner is one of the more common ways an office plant dies. Where a practice has a plant hire arrangement, the cleaning scope should say so and exclude the plants themselves. Naming the arrangement removes a small recurring irritation from the practice's week.
