As already determined, the hot, humid Bali air is most likely fogging the lens and possibly the internal lens elements as well.
It's no different than someone such as I, who wears glasses, goes from a comfortably air conditioned environment outside on a hot, humid day...my glasses fog up. The reverse is true in the winter, going from a cold, maybe 20 degree outdoor air into a somewhat humid house or office, the glasses fog up.
The solution is to allow your camera time to 'acclimate' to the changing environment. While you could simply wait 10-15 minutes and hope the moisture has evaporated, it's easier to put your camera in a baggie and seal it. Then move the camera outside and let it warm up without the humidity getting to it. Once it's warmed up, the humidity won't condense on/in the lens.
The baggie trick works both ways in the winter, not only from cold to warm/moist but from warm/moist to cold. Unprotected, the humidity in the camera may freeze up when going outside when the temperature is below freezing...well below freezing. The trapped moisture would first fog things up, then freeze as the glass and metal elements temperature drops below freezing.
In short, camera gear needs time to acclimate to changed environments. Handling humidity changes is also critical.