You bought the right cleaner. You mixed it to the ratio on the label. You sprayed the coil, rinsed it, and the system is still not performing the way it should. Before you blame the chemistry, ask yourself a different question: are you using the right HVAC coil cleaner application methods for the job?

The equipment you use to put cleaner on a coil determines whether the chemistry can actually do its job. The wrong application method can waste product, reduce cleaning effectiveness, or completely defeat the purpose of the formulation you chose.