Cleaning procedure required for standard and environment guard microchannel coils. Standard and environment guard microchannel coils must. the best a/c system cleaners for cars and trucks lets you breathe deeply of cold, clean air. A clean system not only works better, but the allergens and other debris no longer. to clean microchannel coils, use a coil cleaner and water solution, spraying it onto the coils and allowing it to sit for a few minutes before rinsing it off with water.
