Answer by
LeheckaG (1826)
Saltillo-tile is a very-porous variety of terracotta-tile,
so your Saltillo-tile should have been coated with a quality surface-sealant when it was installed.
When coated with a quality surface-sealant,
a neutral-cleaner & damp-mop should be used to mop your floor.
Periodically, an acrylic or polyurethane sealant & polish can be re-applied.