Image forming apparatus and method of controlling agitating member

An image forming apparatus comprising:

• an image forming unit configured to form a toner image on a sheet and configured to discharge a waste toner;
• a rotating member configured to heat the toner image on the sheet;
• a heater configured to heat the rotating member;
• a power controller configured to maintain temperature of the rotating member in a first mode after the temperature reaches a target temperature, and configured to raise the temperature to the target temperature in a second mode after the temperature falls under the target temperature;
• a waste toner container configured to store the waste toner;
• an agitator configured to agitate the waste toner in the waste toner container;
• an driver configured to rotate the agitator a number of times in a drive if the heat controller stops to raise the temperature in the second mode;
• a counter configured to count a number of the drives;
• and
• an agitation controller configured to set the number of times in the drive based on the number of the drives.