Prepare a mixture of warm water and vinegar in a ratio of 2:1. Use a scrub pad to clean oil gunk from any surface.
2) Washing soap
Warm water and Vim dishwash liquid soap together are very effective in cleaning oil stains easily.
3) Baking soda
Baking soda is also a good cleaning agent. Prepare a mixture of baking soda and warm water. Take a sponge and dip it in this solution. Wipe the area of oil stains with the sponge.
Slice a lemon in two halves, put some baking soda on one slice and scrub the stained surfaces. For final cleaning, use some soda water. You may require a lot of lemons to clean large surfaces.
Any of the above-mentioned degreasers can be used over all kind of oily stains.