About five years ago I returned to working in a darkroom after decades away. Two years ago, I took a break and now plan to return. I got rid of all of my mixed chemicals because two years struck me as too long. Kept all my unopened powder (D-76, e.g.) because I didn't think it aged. My question (assuming I'm right about the powder) is what to do with the unopened, unmixed liquid stop bath and fixer. Is it sure to still be good, or should I just dump it. (Not worth my time to test these small quantities, so if there is a chance they've gone bad, I'll just get rid of them.) Everything's been kept at room temperature (or cooler) the entire time. Thanks.