Things to Remember when Using Oil Eater Cleaners & Degreasers, Always use on a cool surface - Always spot test in an inconspicuous area on any surface before use. The less porous the surface is (i.e. no wax floors vs. uncoated concrete) the more diluted Oil Eater should be. If the surface feels a little slippery after rinsing, add more water to your solution.Please Note: A part is whatever your unit of measure is. For example: If you were measuring in ounces, 3 parts water to 1 part Oil Eater would be – 3 ounces of water to 1 ounce of Oil Eater.