How do you get the funk out???

[Brian Banks]

Looking for cleaning advice from the community.

I'm selling a property where some semi-hoarders grossed out my house for a full 13 months. Despite having a cleaning crew come through and brand new carpet/padding installed, drapes removed, AC filter replaced, it still has an odor that was not there prior. They had four small dogs and they ruined the carpet (hence the 100% replacement), but the rest of the house is concrete and tile....which shouldn't really absorb odor.

Do you guys wash the walls or ceilings? If so, what chemicals (or mix) and how?