General soil spots

The best all purpose home spotter in my opinion is white vinegar. Mix it in a spray bottle 50% water 50% vinegar. lightly spray the area, Let it dwell for 1-5 minutes. Take a white terry cloth and blot the spot until all the soil is transferred onto the towel. Repeat if necessary.

I have used this method for years on spots in my home. Works well on mineral based soils especially.