There's no need to do detaching once the person is detached, as there is nothing left to detach from. If, after 40 days, the person is still attached, then you aren't doing it correctly. Just do it until the person is detached, unless it's extreme like a slave-master abuse thing going on, then 40 days. But for most, just until you feel the person is no longer linked to you. And always use white-gold after to make sure the person does not reattach, and cut contact with them physically.