I am sorry to say, but nothing can be done with this type of release leashes... So many poeple I know have droped a tool because of their bad design. The locking system unclips without even asking the most concerned person first... Sell them and get a pair of BD release leaches, they are unbeatable, they do the job flawlessly, as far as I am concerned
That is the set-up I use on my Quarks.
Charlet is about to come out with a new generation of leashes, maybe then, they'll have something good to offer.