Can I use these sprays on hardwood and upholstery, not just carpet?

Many are marketed as multi-surface, and reviewers confirm using them on upholstery, fabric, dog beds and sealed hardwood. That said, carpet powders are carpet-only, and a few carpet-cleaning community members warn that residue from some spray formulas can build up in carpet fibers until professionally extracted. Always spot-test and check the label for your specific surface.