Press mat firmly down to engage suction cups on bottom of mat. Suction surfaces or tubs with some dirt buildup. Clean area and moisten suction cups to increase suction cup grip. 4) Place motor housing on the floor conveniently Never place the motor housing where it can fall into the tub. Have the motor housing face the user in the tub, as the infrared Remote Control needs to be aimed by the user towards the motor housing. 5) Plug motor housing into 120 V AC outlet. See ALCI yourself with ALCI us