I would still expect them to last more than 6 jobs though and certainly not snap as I'm lifting it up .
They are sold for this purpose after all .
Robert,
You have changed your story, from just moving it along the gutter to lifting it.
We found that a 1.5 metre carbon fibre pole went from 425 grams to 1250 grams in fifteen minutes.
You must keep the poles clean, if the gutters are muddy, clean about every 15 minutes.