+1 Tim.
Also, I started with Apple Cider which is very similar to Apple Sauce but just a litlle bit more basic. I try not to rinse because I like to get more dwell time with the application and think mother natures rinse is much more effective. (rain actually has a higher PH then tap water and in my opinion, get's much better results). In cases with realtors, they need instant results for taking listing photos or open houses so in situations like that, I have no choice but to rinse with a garden hose.