Basil, this gets back to a pet dislike of mine about strata that some owners want things done and they think that if the OC pays for it they are getting it for free with no consequences. While it may not be relevant to you, I decided to use your post as an excuse to vent. Sorry!!
Whale is exactly correct, I think these responsibilities are outlined in the document “Defining Who is Responsible ….” Memorandum No AG520000 from the Land and Property Office.
Austman, is correct in that the specific contract with the cleaner will specify what is to be cleaned. Assuming the OC has contracted the cleaner, if the contract specifies that the front doors are to be done the contract would be more expensive than if they weren’t included.
In our strata scheme some owners regularly ask for work to be done, eg, cleaning, that is the individual owner’s responsibility. I point out to them that if they want this done, we have to arrange to have it done for every owner and levys will have to be increased.