Liquid discharge apparatus and cleaning method

A liquid discharge apparatus, comprising:

• a liquid chamber that has a discharge orifice for a liquid;
• a liquid discharge unit including
• a heat-generating resistor for imparting discharge energy to a liquid in the liquid chamber,
• a first electrode that is provided in the liquid chamber so as to cover the heat-generating resistor, and
• a second electrode that is provided at a different position from the first electrode in the liquid chamber;
• a first voltage application unit capable of applying voltage to the heat-generating resistor;
• a second voltage application unit capable of applying voltage between the first electrode and the second electrode;
• and
• a control portion that controls the first voltage application unit and the second voltage application unit, wherein
• the control portion performs, as operations to remove an adhered substance on the first electrode,
• a first operation which is voltage application between the first electrode and the second electrode by the second voltage application unit and in which first voltage application where the first electrode is an anode and second voltage application where the first electrode is a cathode are alternatingly repeated, and
• a second operation in which the first voltage application unit applies voltage to the heat-generating resistor.