too stiff

[Wayne Hohle]

hi there
i appreciated your timely comments on sluggish centers and wondered of
you could comment on this again for me. i'm dealing with an upright
action that has several butt flange centers that stiffen up with just a
bit of humidity. i had the action out to change some of the pins and was

working on it in front of a patio door and the heat coming in was enough

to solve a lot of the problem. as soon as the action is put back in the
piano , in just a short  time the centers tighten up. i put in a 25 watt

dampchaser bar without humidistat for a few weeks , it did help but the
customer still has some reason to complain. there is not much verdigris
on the pins.
what would you do?
thanks if you could comment
wayne