If you mean oil spots, then take cat litter (unused) and pour a ring around the spot. Then pour mineral spirits on the oil spot until it is saturated. (the cat litter ring keeps it from going everywhere) Let it sit a 2-3 minutes, add more mineral spirits if necessary, and then pour cat litter over the whole area to absorb the spirits. Work it around with a broom to get the spirits completely soaked up. Sweep up and let dry.
It has worked for me.