kinda new to working leather I did years ago but stop and know have really gotten back into it ,I need to know if leather dye goes bad i have 2 that when i use them they leave darker lines and it is screwing everything up.I have tried everything I can think of and when I bought them they were just in a feed store with other leather stuff just wondering if it's me or the dye not having problems with the others just the light brown and dark brown
