Ideally you should dust mop your slate floor every day and damp mop it once a week.
Chinese slate floor tiles cleaning.
Apply a sealer every three to five years or as recommended by the manufacturer.
Apply new stone sealer according to the manufacturer s instructions.
Use the wet vac to remove the clean water.
Rinse the slate floor with a clean mop and clean warm water.
You can clean slate floors regularly with a dust mop a broom and a damp mop.
In this case the tiles were chinese slate and were proving very difficult for the property owner to keep clean due to the lack of sealer to protect against dirt and stains.
Cleaning and sealing black chinese slate tiles in basingstoke you can see from the photograph below how dirty these black chinese slate tiles and grout had become.
Riven green slate kitchen floor cleaned and sealed in oldham january 21 2020 dealing with limescale staining on slate shower tiles in middlesex november 30 2019 removing multiple coats of sealer from a dull slate in south yorkshire november 25 2019.