I work in the HVAC industry. One of the greatest causes of concern for warranty claims is owner-applied home-remedy "cleaning" of the coils.
DO NOT USE LYSOL OR OTHER COMMON HOUSEHOLD AGENTS ON COILS. Get a specific product made for coil cleaning. Costs a bit more, but FAR less than a new evap coil and labor to install.
Google "AC coil cleaning foam" and you've got plenty to choose from.
When using it, several cycles of cleaning is good. Make sure to flush with water between cleaning cycles because, while the cleaning agent does a good job of getting the coil clean, you don't want it jamming up the drain line. Clean, flush, clean, flush ... in smaller doses, with patience.