vyvy,
u could ask yr bun to clean the car if the car belongs to u.
My agent tell me to write on the contact even I did not have car when I sign the contract with her. But I should let her know, may be there is a chance she will clean the car if I buy a car.
i remember there is a listing of duties at the back of the contract, and there is one column called "others" for you to add your specific request, my agent added "car cleaning" and "accompanying children to school". and the contract was approved.
so what you have to do is to add the duties you need the maid to do in the "others" column, but of course, it should be reasonable and domestic related lah.