Antiques, specialist objects, jewels, and any highly breakable item are among the items they are not permitted to clean.
Whether it's fleas, cockroaches, or other small animals, they only clean these properties once a professional exterminator has dealt with the infestation.
If you think paying professional cleaners to clean high windows, chandeliers, and cupboards is a smart idea, think again.
Carpet cleaning is a speciality service that requires particular equipment, tools, and training. People will not obtain the results they want.
They do clean/scrub restrooms thoroughly, including toilets, but for obvious reasons they cannot clean anything that may be deemed a health danger.
Some objects must be handled by a specialist. This is the situation with rare books and valuable artwork. A simple act of dusting might ruin a book's leather cover.
Pink mold in the toilets is a common occurrence, but widespread black mold on walls, ceilings, etc. is a different issue.
If you want a specialized service, such as severe cleaning, you cannot expect your ordinary domestic cleaners to be able to provide it.