They'll stop breeding if they are stressed out. It just depends upon how many more you want. I think that a relatively dry period (no stream, less misting,) followed by more misting and humidity will induce breeding. You appear to be doing a very professional job.
There was a very long discussion on frognet about SLS you might want to check out with a search of their archives. I'm not sure there are any certain conclusions about the causes, but there are a certainly a lot of opinions. I've only had one case of it, a first froglet from my young pumilio Bastimentos, but I don't deliberately breed much, and a few of my dart species are all females. Patrick told me that this is relatively common with pumilios when they are first breeding. It seems to happen more often with thumbnails that feed eggs, and obligate eggs feeders than the larger species such as leucs. Some of the earlier discussions and references attributed it to calcium deficiency in the female, or even both the male and female. I think this was just guessing, like everyone still seems to be doing. Then, there may be a genetic propensity for SLS in certain lines of frogs.
-----
Patty
Pahsimeroi, Idaho
4 D. auratus blue
5 D. galactonotus pumpkin orange splash back
7 D. imitator
6 D. leucomelas
4 D. pumilio Bastimentos
4 D. fantasticus
6 P. terribilis mint and organe
4 D. reticulatus
4 D. castaneoticus
2 D. azureus
4 P vittatus
2 P. lugubris