I used to work for a dealership that sold RVs. Back in the late 70's and 80's the formaldehyde odors were so strong in new units that it would burn your eyes and literally take your breath away. This was in Phoenix and if they were left closed up during the summer you could not go inside until they were left open for a while. A company used to come in and run deionizer machines in the coaches. The machines ran for several hours and you could not go inside for several more hours. They completely eliminated all odors, in fact it was odd to go into one and experience no odors, even plastic shower curtains were odorless. The company who did this claimed none of the odors would return but over time new odors would occur. I don't recall odors returning. Don't know if those machines would even be legal today, and the use of formaldehyde in adhesives is not allowed at such high levels today. So maybe the process you can have done would be effective.