David it is not you
We have had thte gutter vac for some years now and the clamps never hold that well
We have had free replacements so no bother with the customer service but once they have been used for a while and get dirty they are a bother
We often tape the joints, no clamps just strong 3in plastic tape and it works well don't use gaffa though as it leaves glue residue
It takes a bit of getting used too but tape is best
Gordon