<p>An electrolytic device is provided with an electrolytic vessel, a heater, and a blower. An electrolytic bath is contained in the electrolytic vessel. The heater is provided in the electrolytic vessel while being electrically isolated from the electrolytic vessel. The blower is also provided in the electrolytic vessel while being electrically isolated from the electrolytic vessel. The temperature of the electrolytic vessel is increased by turning on the heater. The temperature of the electrolytic vessel is decreased by turning off the heater and turning on the blower. The temperature of the electrolytic vessel is kept constant by switching the heater and the blower on and off.</p>
