I bought a house a few year ago at very good price. The previous Indian owner occupied it for 1 year and 10 months. I changed almost everything changeable. I threw all old carpet and replace the vinyl floor in kitchen and bathrooms with ceramic tiles. I discarded the old stove and washed the hings by taking them off from the kitchen carbinets. I painted all walls, ceilings and cabinets. I changed all window curtains. And I installed an air exchange. After a few months of the air exchange installed, the smell was gone.