On June 12 I had a house fire with my Everett upright piano suffering smoke damage. My piano technician spent an afternoon wiping down all the surfaces with warm water only. He didn't touch the hammers, strings, or other moving parts of the action. He was happy that the piano seemed to be in good condition. It is the only piece of furniture left in my house right now and is wrapped in many layers of protective wrap for the other dust that will follow the refinishing of hard wood floors and other construction dust.

My question is about the ozone machine that the cleaning company uses to remove odor from a home. They recommend using that on my piano in the next few weeks when they get ready for it. My technician will open the piano to allow it to get to the strings, hammers, and inner parts.

Is this an acceptable process to use on a piano?