This is my first time rooting figs.

I have some cuttings that rooted strong in the plastic bag with moss and are now in the clear plastic cups with an 80/20 mix of perlite/peat.  The cups have holes drilled in the bottom as well as a few small holes drilled into the sides.  How often and how much water should they get? 

I first put them in the cups about 3 weeks ago and fully watered the media at the start.  For the first 2 weeks, I just misted them about every other day.  Then I fully soaked them again after about 2 weeks.  Since then, I have been misting. 

I have some growing really strong that I have transferred to 1 gal with 50/50 perlite/peat.  But have also lost a few in the cup stage.  But that could have been because I had them in the sun. 

when in cup stage, water control gets little touchy. if you water too much, they will die. if you don't, they will die. i use 50/50 perlite/soil. that mix hold water for months under the humidity dome even with daily airing between 30min-few hours. towards the spring when the cup is almost dry, i would very lightly water the soil. i don't mist them. when mist, it's due to the fact that top of the soil is dry. 

with 80/20 mix, more than likely your mix will dry up faster. but i wouldn't water unless the cup is definitely lighter and it requires watering. no set schedule. only water as needed. 

ditto for Pete. Less water is a lot better than more. This is also the time you have to watch for the dreaded fungus gnats. At first
sign I started fighting back. Carnivorous plants, sticky traps and Gnatrol (BT). At that time I also start watering from the bottom only.

I use 90% perlite and 10% vermiculite with lots of holes drilled in the cup. It’s very diffcult to overwater as it drains right out and with the cups in a slightly covered contained you can see humidity in the cups for 4-6 days before they need to be watered again. 

Also, I noticed that the perlite in some of the cups has turned green, is this a problem?