Hey i bought a thing of petastic and used it all already, but i was wondering if it could be used as a preventative? Because this thing really does clean the carpets well it even took off stains and aged dirt that was not caused by my dog. So now my room has "Clean Stains" where the places that my dog went on are now the cleanest, brightest colors on my carpet. So i wanted to actually use it for the rest of my carpet if it would prevent my dog from going in my room. If not then i'll just buy some commercial carpet cleaner to even out the carpet colors.