You may need to replace drywall because of smoke damage. If the drywall is covered in soot, you may be able to clean it, but it will require a lot of time and effort. You could spend hours cleaning the drywall only to find there is more damage and it needs to be replaced anyway. It’s usually easier and safer to remove the smoke-damaged drywall and replace it.

Ozone smoke removal uses an ozone generator to eliminate stubborn odors from sources like house fires, wildfires, or cigarette smoke. Ozone (O3) is a highly reactive, unstable gas that neutralizes odors by oxidizing the organic compounds it comes into contact with. During this oxidation process, ozone "donates" its extra oxygen molecule to the smoke particles, effectively eliminating their smell, with oxygen being the primary byproduct. While ozone can be effective for removing smoke smells from building materials and belongings like wood furniture, this treatment is best left to a professional, as improper use of an ozone generator can be dangerous to your health.

Luckily, you can typically eliminate your microwave’s burnt smell within a few hours for most situations. Be sure to let it air out for two to three hours after cleaning to let the odor evacuate your home—if you close your home up too early, the odor will be trapped. For stronger, more stubborn burnt smells, it might take a full day or more to really notice a difference. 

Smoke damage will not go away on its own, but with professional remediation and restoration, you can return your home to its original condition after a fire. Trained smoke restoration professionals can eliminate smoke damage, which can affect areas of your home that are hard to see or access, and restore or replace smoke-damaged materials.