Andy, get in the LBS for a bleed. I got the bleed kit with my post but my time is too precious now with a young family to mess around. What was shed time and bike time has reduced so much that I have to bargain for bike time.
It takes my guy (Sam at Crank Cycles in Alton, well worth a plug this guy) about an hour. Drop post in shop, take boy to park, get text to collect before he’s bored of the slide, sweet. Post fixed + browny points and quality boy time.
I was just curious why all the saggy post posts all came this week. It’s an epidemic I tells ya!
Maybe one or 2 issues have sparked everyone to go and inspect their own seat posts to find they all need a bleed?