Prior to this product I was always concerned about the chemicals I used previously and rinsing them off so my dogs would not react. Now I have no worries with this safe product I can spray the turf, deck wood and cement deck all clean on a daily basis. It says allow to dry before dogs go out but just to let y'all know my foster dogs have charged out the door and opened it walking on product with zero issues. I actually use the sprayer to wash my hands when I'm using it between scooping. The only time I have found to be cautious is when you empty the sprayer container of water. That is concentrated and the first minute of initial spray is same. It will rust certain metals but not aluminum so it's safe on my proper scooters to wash them off and my Playpens seem to be fine. But if I use on kennels I will rinse it off right after. I have sprayed my entire back door and windows and no rust. All fine. This product helps me keep a clean environment for all my fosters and personal dogs!!