So the unit I'm renting had what I assume are a standard type of HDB windows that open outward and close together in the middle. Only one of the windows has the rotating handle that locks them both shut. The other one (without the handle) has a small internal latch which you can close to prevent that second window from swinging outward.
We have one set of windows where somehow that latch was half opened/closed and now both windows are stuck to each other by that latch, preventing either from opening. The only intended way to access that latch is by opening the first window, but it is hold that window shut.
We can't be the first people with these windows to have this problem. Is there some kind of trick perhaps someone here knows on how to get them open? Or is it standard to a call either a locksmith or some type of Singapore window repair man?
A few photos to hopefully explain:


