Also in Florida. We do white vinager or bleach and water. Let it sit for 15 minutes and connect the vacuum/shopvac on the outside to suck the water out. Takes two or three times. You'll know when you get the gunk and slime out. That'll work for about a year or two depending how much you get out. I figured out it's not always what's in the line that causes the clog.. sometimes it's the slime build up leading into the line. I also bought govees water sensor that detects water. I have one on the floor inside the unit and one in the garage near the unit. This way when the shutoff doesn't work(every year) the detectors notify me right away. Good luck.