Find the external air inlet and turn on the air conditioner to the highest level, and then adjust it to the external circulation. 2. Shake up the cleaning agent, and spray it into the external air inlet. 3. Turn off the air conditioner for 3-5 minutes. 4. Turn on the air conditioner; the dirt will be discharged automatically from the drain outlet. Household air conditioner: 1. Open the panel and take out the filter screen. 2. Shake up the cleaning agent, and spray it on the compensator, and wait for about 3-5 minutes. 3. Turn on the air conditioner to the highest level and continue to spray the residual cleaning agent. 4. Fix the filter screen and the panel, the dirt will be discharged automatically from the drain outlet.