At night the plants 'breathe' the somata open and the plant handles co2 and o2 along with any substances not needed. This goo is called guttation and should not be confused with dew. Guttation may contain organic and inorganics, sugars, mineral nutrients, potassium, etc.
Turf managers water in the morning for a reason. It is to wash off the guttation because it can promote diseases. And this guttation that will be right next to the stomata, a direct entrance to the inside of your plant. So I water my plants whenever I feel like it but, when I mist, I mist a few minutes before the lights go on to make sure the stomata are clean and it is dried off by the lights.
In other words, not mist at night. Remember darkness, non-air circulation, humidity are your enemy. At night you have 2 of those 3 factors-darkness and a slightly high humidity. imho