Though I also think it;s the poorly maintained toilets. There's just that certain... Aroma... That reminds me of open sewers, or the smell at the north-bound section of the Bishan MRT. I think the circle line diggers dug too deep.
Did you ever hear the expression: "I can smell a good deal from far".. ?? Peninsular Plaza tries to make it hard for newbies to smell ni the air a good deal, easier for those of us who are used to the smell