ONA PRO Gel is as close to odorless as we have ever come. Although it has a slight scent when sniffed in the container, the final result when working on powerful, noxious odors is simply a clean, fresh smell - period.
It leaves nothing behind to indicate that any odors were present. ONA PRO Gel is the best we've ever done, and it is all you will ever need. No scrubbers, no filters, nothing - just ONA PRO.
Ona offers a MONEY BACK GUARANTEE if you are not satisfied with the results.