Arm & Hammer Pet Fresh is an odor-eliminating powder that can eliminate the scent left behind by pet accidents. Start with dry carpet for best results. To use Pet Fresh, just sprinkle the powder—which includes OxiClean Dirt Fighters—over the dirty carpet. Allow it to sit on your carpet for at least 15 minutes. Next, vacuum the area well. If you still notice an unpleasant odor, leave Pet Fresh on your carpet for 30 minutes and try again. You can also use Arm & Hammer Pet Fresh every time you vacuum.