I use it as a deoderizer additive to prespray when there are odor issues, I use the lemon and love it! When using OSR, I add it, odorcide and quatalot to the mix, it helps to mask the odor until the dwell time and extraction is done. This keeps the homeowner from getting overly concerned that the odor got worse. In the prespray, I always have customers comment on the clean smell of the lemon when I use it. It has a small amount of quats so I dont have to worry about resoil but know it is also helping to eliminate odors as well, great product