Spread cat litter on the kerosene spill immediately. As the kerosene absorbs into the litter, sweep it into a dustpan and dump it into a trash bag. Apply more litter to the spill, if necessary. Allow the litter to sit until the spot is dry.
Sprinkle the spot generously with heavy duty laundry detergent powder. Allow it to sit for five to 10 minutes, then scrub the area with a nylon scrub brush dipped in hot water.
Lay an absorbent cloth over the spot. Once it's saturated, replace it with a dry one, repeating until the soap and kerosene residue is gone. Allow the spot to dry.
Sprinkle the spot with baking soda to absorb the kerosene odor. Allow the baking soda to sit for 24 hours, then sweep it up. If the odor remains, place a 1-pound open container of activated charcoal in the area and leave it until the odor is gone.