<HTML>In a message dated 6/24/2002 8:51:55 AM Pacific Standard Time, chikring@midcoast.com writes: <BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">Subj:Slow hammer return Date:6/24/2002 8:51:55 AM Pacific Standard Time From:<A HREF="mailto:chikring@midcoast.com">chikring@midcoast.com</A> Reply-to:<A HREF="mailto:pianotech@ptg.org">pianotech@ptg.org</A> To:<A HREF="mailto:pianotech@ptg.org">pianotech@ptg.org</A> Sent from the Internet   Wow , Arthur</BLOCKQUOTE>     This subject has been round this list numerous times. You have a rip snortin case of vertigris. The green grit, the green slim , the factory gift that keeps on giving year after year. The short version is nothing works long term. (No it probably wasn't the floor humidifier) Short term, use whatever works remember it's ALL temporary. 1 to 12 months or so. My latest favorite is goose juice from Joe Goss ant mother Goose tools. Ask some one to post  his address I don't have it on file.    I hope this helps some. nahhhh    Dale <BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px"> List, I have a customer with a 1921 Steinway Upright with very slow hammer return, which I think was caused by a floor humidifier.  I  heated the hammer butt centers with a hair dryer, which freed up the hammers for about 1 hour. The questions is what do you think is the most reliable way to free up sluggish hammers without replacing center pins or parts?  Should I use silicone and naptha, alcohol and methanol or install a Dammp-Chaser heater bar with a humidistat? Thanks, Arthur </BLOCKQUOTE> </HTML>