http://odorsweep.com/four-ways-to-remove-curry-odors-from-home/
I've never had to deal with a pre-existing curry stench in my home, but I can imagine it's awful. Back when I was in an apartment I was the only non-Indian in the place. Mostly it wasn't too bad, but one day, I discovered my apt reaked of vomit. Having gotten drunk the night before, I surmised that perhaps I had puked somewhere. But I hadn't gotten that drunk, I didn't feel sick, and despite a thorough search, there was no barf to be found! Then I stepped out into the hallway and discovered the smell was even worse! It was clearly comnig from someone's kitchen! The only thing worse than curry is CHEAP curry! This did lend urgency to my search for a house.