As I know of India and more in South India and Chennai, people (especially the vendors and hawkers) will very quickly get a feel about something different happening.
Thanks Amithab. We r very well aware of the people, who may notice something different, In addition to the hawkers etc, another very important person we have to be careful is the part time maid who takes of cleaning the house and the dishes. luckily we dont depend on her for our laundry. So far it is only one kitchen and we r yet share the bedrooms. no problems. But when next month when my cousin and his wife move in to the first floor, she may smell something, for that we have worked out an arrangement in which we will be engaginge the maid for only house cleaning and we share the cleaning of dishes