Ridding strong odors in your house...
You might already have tried to get rid of the odor yourself, so I'm going to tell you how to get rid of the stubborn odors that don't go away with chemicals you might try from places like a hardware store.
Odors caused from CATS,SMOKE, URINE, NICOTINE, and CONTAMINATION from MOLD & MILDEW and FUNGUS can be pretty stubborn.
Here's what I recommend:
1st. If the odor is light, you might try using Arm and Hammer baking soda powder over all the carpets. Having the carpets professionally extracted might solve the problem, but if the odor still comes back you have to replace the carpet and padding.
IMPORTANT-Before you put new carpet and padding down, use an odor eating agent like Neutron Industries orange odor eliminator. I've use this product and it works. Follow the directions. You have to add water over the product to activate it.
2nd. Once the carpet has been extracted, you will have to wash the walls with tri-sodium phosphate. You can get it at the paint store or a hardware. In some cases you have to prime the ceilings and walls with a stain and odor blocking primer and then paint. It just depends on how heavy the nicotine is. I usually wash the walls with a good degreaser, but male cats mark their territory and you cannot see the trails on the walls without a black light.
3rd. Call a professional to clean your air ducts. You might have to use a fogger to stop the odor trapped inside, but taking all the fuzz and lint out of the air ducts will usually give you some good results. Getting rid of the allergens, mites and microscopic life takes some professional fogging. Your duct work may be full of all kinds of odors.
You local H-VAC Guy can help you at 800-440-6515