High humidity in winter?

[Daleboy@AOL.COM]

Hi Mike,
    I've been in your type situation before and can recommend that you 
investigate the symptoms thoroughly before you install a complete Dampp 
Chaser system.
It's not a bad idea at all to install the system but, there may be problems 
occurring that the DC system may not correct.
I would do a close visual inspection, removing enough parts to get down to 
the keys to be able to isolate the cause of the sluggishness. May not be in 
the keys at all.
A reading needs to be taken on the humidity using some type of accurate 
hygrometer as well. If the culprit is indeed the humidity and the D.C. system 
is decided upon, I would recommend including a complete cover for the piano 
in the price as this will help to make the system more effectively address 
the key problem. Hope this helps!
Regards,
Dale Whitehead, RPT
Franklin Piano Restorations