Put the Cutting in promix about a week ago and covered it with a makeshift humidity dome.  Its sitting in my unheated garage with no heat mat or any source of warmth.  I checked the cutting 2 days ago and it was doing great with lots of growth.  i checked it again this morning and saw MOLD..  i uncovered the cap on the soda bottle and im hoping that the mold with no spread.  should i remove the bottle now and not wait and just spray with watered down bleach?   

Looks like you have way to much moisture going on in there

I would let it air out. Remove bottle and mold. If the cutting is rooted you probably don't need that humidity bottle. Once they show top growth and rooted, no humidity help. If not rooted yet kill the mold first and like some holes around the bottle and keep on until roots form. If the cutting was infected prior you would need ro pull cutting and sterilize.

It is not easy to see but it looks like the top most part of the cutting is where the mold is.  The wood from the top of the cutting down to the first node will always die eventually so it is probably the dead/dying wood that is molding while the rest of the cutting is likely ok.  Thus I wouldn't worry about it too much but I would take other's advice and reduce humidity, maybe not all at once but in stages.

I have been using peroxide and gently wiping down the clipping and its surroundings, its been working well, if it comes back, just hit it again. I learned when I was hit with Hurricane Sandy that bleach will kill on surface level and is good for tile and plastic etc, but when it comes to wood or anything porous, peroxide works better as it absorbs it deeper.

Diluted hydrogen peroxide in a spray bottle does sound best. And it would even be beneficial to the plant beyond just ridding it of mold.

Also, a question for anyone who would know.. It seems like the unheated garage in winter would be too cold for a new cutting, and that it actually contributed to the mold growth? Or would this unheated location be okay?

Figlaya, did your cutting start growing while in your garage, or did you take it out there after it sprouted leaves?

thanks everyone for the advice...ill go ahead and remove it when i get home tonight.

LJFIGGY:  i grew them in a make shift grow box for about a month till i saw roots and and lots of sprouting, i took them out.  but they have been in my unheated garage since day one.  im not allowed to bring them in the house so the garage it is.  i can aslo hide all the plants and cutting im rooting from my wife...

Well, although I don't know the whole story about why your wife reacts as she does, it makes feel bad for you. If you don't mind talking about the subject, why does she oppose your growing figs??

I wonder if she would also dislike the idea of homegrown delicious fruit, and the possibility of even making some extra income on the side?

Sooner or later, it's probably inevitable that she's going to see evidence of vigorously growing fig trees in your house or yard!
Hopefully your moldy cutting is showing improvement...LJ

I remember at farmer's markets the husbands would say let's get a fig, the wives would say no i hate figs. Then they would leave, I never once seen a husband get a fig if the wife said no. It seems figs, are not worth a fight.

I had one lady walk up and say "Oh No"
FIGS!.... No offense to you, but I thought that by moving to Hawaii the fig nightmare was over! My husband had nothing but fig trees in the yard. I'm going to make sure he doesn't come down this row!

My wife doesn't like figs either. She is coming around to the growing. I grow numerous fruits. Anyway part of it is that I pay more attention to the fruit than her. And I admit I do! So it has been an uphill battle to turn her around on the fruit growing. I do have an edible landscape of numerous fruits. I have 9 fruit trees in the yard (none are figs, all stone fruit). Berries of every kind, and I grow onions, garlic, peppers, potatoes, beans, melons, and tomatoes every year. I have seed to about 50 different tomatoes, same with peppers. She is starting to like having all the fresh produce.  I try new stuff every year too, this next year cauliflower and broccoli. the peaches were a huge hit. I grew Hatch type green chili's and the green chili stew I made was just awesome, I was told I have to grow the New Mex green chili's every year. So she is coming around.

So Joshua grow something she loves, as fresh from your yard will blow away any store bought crap.