not sure how to search on this one, and the results didn't answer my question. got some dektol clone stock solution mixed up, probably about 6-9 months old. stoppered full bottles. is there a daylight 'clip test' i can do to see if it's going to still work? i only ask because it takes me a fair amount of time to turn the laundry room into a darkroom, so i'd like to test beforehand. obviously it's been awhile since i've printed, if my dektol is that old.