The first section gets more wear than any of the others and because its the thinnest diameter the wear is more of a problem. Try to get into the habit of not fully extending the first section on easy windows to try and spread the clamping wear more evenly along the length. If you fully extend every time its the same bit that gets the clamp on it each time.
Once it is worn you have no choice but to replace the section. The sections also wear from constant rubbing on the inside of the nect section. Since the tape never seems to last that long they can go paper thin at the end and thats when cracking can occour.