Pitch pine block flooring, 1.25 inches thick.
Most of the floor, particularly traffic areas, is covered with rugs with
mats at entrances.
It is swept daily and buffed regularly, waxed 2-3 times a year.
Parts of the floor are now almost black with muck and grime.
There is no appreciable wear and I don't really want to have to sand the
whole floor which is about 50sq.m.
The flooring when laid was sanded, sealed and waxed.
Any suggestions for cleaning it please?