I have a "new to me" 20 year old pilot house sailboat. The sliding windows are pretty much frozen in place by the salt
encrusted "felt" channel liner.
I have tried in vain soaking the salt
from liner in fresh water
(Though living on the "Wet Coast" of Canada
there is no shortage of rain).
I would welcome suggestions of how to get these sliding windows functioning again.
For what it is worth I am able to get them to open an inch or two.