Cleaning method and cleaning apparatus

A cleaning apparatus, comprising:

• a cleaning tank having a substantially rectangular parallelopiped shape with a region for storing a cleaning target with an incline;
• a first inflow section for allowing a fluid to flow into said cleaning tank, said first inflow section provided on a position in a region on a first side surface of said cleaning tank in a vicinity of an upper end of the cleaning target inclined, the region corresponding to a distance between the upper end and a lower end of the cleaning target with respect to a bottom surface of said cleaning tank;
• a second inflow section for allowing the fluid to flow into said cleaning tank, said second inflow section provided on a second side surface facing the first side surface on which said first inflow section is provided so that a height of said second inflow section from the bottom surface of said cleaning tank is in a vicinity of the lower end of the cleaning target inclined;
• and
• a plurality of outflow openings for releasing the fluid flowing in from said first inflow section and said second inflow section, said plurality of outflow openings provided on the first side surface and the second side surface so as to contact an upper surface of said cleaning tank,
• wherein at least one of said first inflow section and said second inflow section has a plurality of inflow openings whose heights from the bottom surface of said cleaning tank are different from one another.