I had a customer call me and ask for a quote on sparkle washing her house. She said her realtor suggested sparkle washing before she puts it on the market. I said sure I’ll come by on Monday and price it. In this area most houses are vinyl so most of my house washes are for vinyl siding and usually those with wood siding are wanting it washed and stained. This particular house is wood siding and all she wants is a wash. Whats a good mix for washing the house that wont cause it to fade?