About 6 feet of one of our rain gutters is dry. The rest contains about 3/4 in. of standing water. I successfully removed the enormous screws from the hidden brackets (or whatever the correct term is for those) holding the gutter to the Florida room. The brackets won't budge. At all. They are underneath several layers of roofing accessories, including a fairly thick (presumably PVC?) flexible white roof cover that surrounds the brackets and hangs into the gutter. The roof covering is held on by what looks like one or two metal strips that have several two inch screws holding them on. If you loosen that metal strip, there's a brown drip edge right under that, and it looks like the part of the bracket that clips onto the gutter edge nearest the fascia is UNDER even that. Drip edge around the rest of the house does have some space under it, but the gutters are all different, so I can't even figure out what to do by looking at the gutters that aren't complicated by this roof covering. I want to try using a mallet to tap the brackets and encourage them to release the gutter edge, but I don't want to break anything either. Considering just making another hole and having a second downspout. The gutter in question is 18 feet long. It's obvious that the end with the downspout is a little bit higher, and a level confirms that. Thoughts?