| 摘要 |
An inventive recovery cup cleaning method is a method for cleaning a recovery cup having an interior wall partitioning a recovery space into which a chemical agent used for treating a substrate is introduced, the recovery cup being configured such that the chemical agent introduced into the recovery space is further introduced into a predetermined chemical agent recovery passage so as to be recovered. The method comprises the steps of: cleaning the interior wall of the recovery space with a cleaning liquid; cleaning the interior wall of the recovery space with a chemical cleaning agent after the step of cleaning with the cleaning liquid, the chemical cleaning agent being of the same type as the chemical agent to be recovered through the recovery space; and draining the cleaning liquid introduced into the recovery space in the step of cleaning with the cleaning liquid and the chemical cleaning agent introduced into the recovery space in the step of cleaning with the chemical cleaning agent through a drain passage which is different from the chemical agent recovery passage.
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