Dry, windblown debris blocks the airflow a condenser needs in Tuscola.
Cooling equipment has a harder job when the outdoor temperature is already high: the condenser coil has to shed heat into hot air. Around Tuscola, dry and windy weather carries dust and seasonal plant debris onto the outdoor unit. Grass clippings and ordinary grime add to that layer, matting the face of the coil and restricting the air that passes through its fins.
That restriction is more than a cosmetic problem. When air cannot move freely through the condenser, the system releases heat less effectively, capacity drops, and the compressor and fan work harder through the cooling season. Outdoor-coil cleaning is about opening that airflow back up, not simply making the unit look cleaner.
Indoor coils need attention for a different reason. Dust that gets past the filter settles on the evaporator coil, where it interferes with airflow and heat absorption. We clean coils without driving debris deeper into them or bending the delicate fins that the system depends on.