it was hard for me to understand myself how I can clean my air conditioner at home on my own. But nothing! my friend gave me advice to read the article how to clean hvac coils www.fortador-usa.com/blog/how-to-clean-air-conditioner-coils-cleaning-hvac-coils and now I quickly learned how to clean on one's own. It's not as hard as it sounds, but it can save you a lot of money.