my first extreme pole (25 footer) was used every day for virtually all my work for 18 months.the top 2 sections are worn now but ill buy 2 replacements and itll last another year at least.
my new one has metal clamping bands which will reduce wear.
every week i take the sections apart and flush them out with water,dry off,re assemble and then spray with dry PTFE spray.i use the specialist silver WD40 stuff(mine cost me under £7 inclu delivery on amazon)
dont over extend the sections,be careful when shutting windows(stand further back).
every few months or so replace the joint stop tape
clean pole hose during your working day often with a cloth
dont overtighten the clamps.just tweak them so they just hold the section