Welspun acknowledges that dust accumulates in the grooves of their tiles which they sold to us as low maintenance. They suggest SCRUBBING floor using vinegar. WHEN WE ASKED IF THIS IS DEFINITION OF "LOW MAINTENANCE " THEY STOPPED RESPONDING!!!! WHO CAN SCRUB A 20 * 15 FT HALL EVERYDAY ?? MY MAID TAKES 4 DAYS AND SHE HAS GIVEN UP