| CPC B01D 47/06 (2013.01) [H01J 37/32844 (2013.01); B08B 9/0813 (2013.01)] | 11 Claims |

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1. A wet cleaning method, comprising:
supplying a first gas from a first process chamber into an inflow chamber through a first inflow portion;
supplying a second gas from a second process chamber into the inflow chamber through a second inflow portion;
colliding the first and second gases with each other within the inflow chamber;
rising the first and second gases toward a scrubber housing that is placed on the inflow chamber, the first and second inflow portions being below the scrubber housing;
downwardly spraying a cleaning solution through a spray nozzle in the scrubber housing above the inflow chamber and the first and second inflow portions; and
hydrolyzing an ingredient, the ingredient being included in at least one of the first gas or the second gas, with the cleaning solution sprayed through the spray nozzle.
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