Anytime a downspout is installed at a virtually horizontal level you have a recipe for continued clogged downspouts.
Gutter angled downspout clogged.
You have to remove the spout to access the downpipe.
Check water flow over gutters.
The downspout is the pipe that runs down the building from the gutter to the underground downpipe.
If you see water flowing over the edges of your gutters and not through your downspouts your downspouts are most likely clogged with a small object or leaves and twigs.
Then unscrew the straps attaching the spout to the house.
When responding to such a clogged downspout the intelligent problem solver should both clear the clog but also determine if over crimping is the culprit and adjust the overly crimpred elbow so that it allows maximum water flow and does not stop or trap debris.
Remove the screws at the top of the downspout connecting it to the gutter.
When you reach the top opening of the downspout ask a helper down below to turn on the water.
This will let you know if there is any clogging in the downspout of the gutters.
The clogged downspout is due to the fact water slows down at this flat or dead level point.
Remove the downspout from the pipe.
Climb a sturdy ladder with the end of a garden hose in one hand.