I can get the gutters clean but the downspouts are a problem.
I noticed water coming out of a joint the last rain, and that is usually backing up from a clog.
I tried: leaf blower from the bottom, garden hose from the top, plumber snake from the top, and it didn't come out. I finally took it apart and the piece between the first two elbows was full. It was a combination of old roof granules and oak tree male flowers with some dirt.
Is there a better way than disassembling? Maybe a smaller diameter hose? I couldn't get the garden hose very far in.
Two of my downspouts feed directly into an underground pipe and I can't even check flow from those.