I have an old Lynch No. 150 box call that I got from friend about 10 years ago. I would guess it was built in the 60's or 70's. I used it for several years then put it aside...it just doesn't sound good anymore...hard to get sound out of like the lid has become too slick. I don't want to damage it so I haven't done anything to it...I can't say how it was cared for before I rec'd it.
I chalked it as needed and it doesn't appear to have an excess of chalk on it. Any ideas on how to condition the call to put it back into use?