Which is better, foam cleaner or liquid cleaner?

Hello, high foam air conditioner cleaning agent is easy to use. Turn to the evaporator fin of the air conditioner. Low foam is generally a water agent, both inside and outside the machine can be washed! Use professional air conditioning cleaning agent, food grade, environmental protection. Air conditioning cleaning agent should be neutral, non-corrosive and harmless to the body. However, when cleaning, disassembling and cleaning the air conditioner, be careful not to damage the fins of the panel slot and evaporator condenser, so as not to affect the air output. Dirty air conditioning is indeed a potential killer of health!