( I used 1 cup of Heinz Cleaning Vinegar, and 1 cup of blue Dawn". Heat the vinegar and pour into your spray bottle. Use a good spray bottle. Add your blue dawn.(must be blue) to your cleaning vinegar and shake. It will be a little thick. Spray on your tub and leave one hour. Then just rinse off. You are going to Love this..no more scrubbing. The Heinz Cleaning Vinegar was with the vinegars at one Walmart and at another it was with the cleaning products.