I have a pair of glasses I use for fishing with leather glare guards. I sweat a lot! They have become stiff; is there anything I can use to soften them up? I have some of the Pecard products which I have used, and while I like them for some things they haven't helped on these.

Secondly, I have a knife sheath which has green stains from leaving a brass hilt in contact with the leather too long. Is there anything that will take those out?

Thanks...

The difference between genius and stupidity is that genius has its limits. - Albert Einstein