Steps for Removing Grease Stains
Step 1: Sop up any wet areas
Apply cornmeal or sawdust (this is especially important immediately after a spill) Leave it on the stain for three hours and sweep up. Then, use one of these methods to remove the stain:
Step 2: Sprinkle dry dishwasher detergent on wet concrete
Let it stand a few minutes and then pour boiling water on the area. Scrub and rinse.
Step 3: Scrub the stain with a stiff brush and concentrated laundry detergent
Rinse well with a hose. Let dry, and repeat if necessary.
Step 4: Sprinkle on trisodium phosphate (TSP)
Allow it to stand 15 to 30 minutes. Then scrub with a stiff brush and hot water. Rinse with clean water. If you use trisodium phosphate, ventilate the area well, and use rubber gloves to avoid skin contact. Wash thoroughly after use.