We've been in our new build for 2 months & we finally started cleaning our master shower ceramic floor.

It wasn't dirty or had mold or mildew but just regular upkeep.

Just used some light elbow muscle, a scrubber & some Dawn soap.

Rinsed & walked away. Next time in, noticed a gritty feeling under our feet & some light dust particle in areas where the water doesn't go to.

Is this normal?

Would scrubbing ceramic tiles cause flaking of either the tiles or grout?