Get Rid of Burn (Burnt) Smell in House

So my roommate didn't use the microwave correctly (he thought he had set it on 50% power but had not) and his microwave pot pie burned to a crisp, ruining the microwave (yes, he bought a new one). Now we had to deal with the awful burnt smell (imagine burned popcorn times 100).

First, we opened up all of the doors and windows. Next, we set bowls of vinegar around the kitchen and living room. Finally, we used small paper plates with a teaspoon of fresh coffee grounds on each plate. We left both the vinegar and coffee grounds overnight. Today we boiled water on the stovetop and added a few tablespoons of cooking vanilla.

This morning, most of the smell is gone. We threw out the coffee grounds and just left the vinegar. Seems like another day or so and the smell will be completely gone.