[pianotech] Heavy keys...

[Mark's Piano Service]

I have a Baldwin "L".  Made in 1994
The action at the keys seems very "Heavy". Some keys more than others, but 
from A0-C8 most of the keys are difficult to push. It's as if there is 
something under the keys holding them back.
Of course, there is not, but I am at a loss here.
Any suggestions?

Tank you...!

Mark D. Montbriand

Mark's Piano Service
 markspiano at att.net