I just had to share this! Some may already know this but I didn't. If you put 1 cup of water and 1/4 teaspoon of salt in a small pot and bring it to a boil and then drop your gunked up coil and boil for a few minutes it will break down the gunk off the coils. Rinse the salt water off the coil and let the coil sit on a paper towel overnight till it dries. You can usually get about an extra week out of your coils!!! This is for all you people that are trying to save a dollar! I know I am. Every penny helps these days!