if they are old, you might consider ditching them. (for you and your partners' sakes!) they might smell good fresh out of the dryer, but the embedded nastiness will never really go away.
if you're working on your leads, i'd recommend klahanie crack on your next visit. it takes gear well (too well if you're prone to overprotecting), there isn't really stuff around for your rope to get caught on, and the jams are superb.