Mysterious footprints that won't go away
OK, I don't think the house is haunted, but about 5 yrs after building we had some chalky-looking footprints mysteriously show up in the hardwood floor finish. Thesse were initially pretty indistinct, but are getting more noticable with time, especially when late afternoon sun casts a low-angle light. These footprints look like a tradesman's boot. We had lots of tradesmen in and out over the years, as the job was done piecemeal over several years, and it is likely that someone was walking around and tracking something across the floor. The flooring is jatoba (Brazillian cherry) with a sealer and several coats of satin finish. We have tried cleaning with detergent, Murphy's Oil Soap, and Bona. Nothing touches these haunted footprints, which only seem to be getting worse with time. Any advice?