Carpet gets ripped out too, as does any permeable linoleum or other flooring. Headboards, artwork, also gone. Pretty much all that’s left are the bathroom fixtures, the walls, the ceiling, and maybe some metal furniture. At which point everything gets sanitized and cleaned with solutions not available to the general public, like synthesized bovine enzymatic cleaner (the stuff they use to sanitize slaughterhouses) or industrial-strength hydrogen peroxide.
Once that’s done, someone has to sand down or fill holes in walls that may have caught a bullet or other debris.