Misting should be done as aften as needed to keep the area humid...If you use a dome, then you don't need to mist as often, but some of us now use no-wilt and no dome...I spray 1-2 times per day.

In answer to your query. you can build or buy an aero cloner, and if you use aero, you will no longer need to mist the cuttings...Yes, you are right. I have 3-4 threads on different types of cloning.

clones in 10 days homemeade bubbler

cloning directly to hydroton bubbler. If you make a bubbler. you don't have to turn on/off anything. you just top off every 3-4 days so you maintain good water level.

24 site aerocloner...can't remember name of thread, but search through hydroponics, there are several good cloning threads that'll give you ideas about your options. peace