A few decades back, a kitty walked across the stove(according to the ex), changed the burner setting to high, & turned something in a saucepan into coal. It was an Oklahoma summer day when the humidity was 100 % & no rain, & the air conditioner got smoke smell all through it-& of course the whole house smelled like smoke. I had to wash every surface & everything fabric with vinegar or baking soda. I made a paste of soda & water & after it absorbed overnight, washed it off. AC I cleaned in soda water. The smoke still lingered, so I sliced many apples in half & placed them all about the place. It did absorb much of the smell. I also slowly simmered spices on a back burner such as cinnamon, cloves, with orange slices in water--but only when I was able to be home & check it frequently. Seems like it took a few weeks to clear it out.