Preventing/ dealing with mold on grapevine and other woods

I had a piece of grapevine in my snakes enclosure for about 3 weeks, today when I was spot cleaning I noticed that a small amount of greenish blue mold was starting to build up where the wood had been in contact with the substrate (I use coco fiber + cypress mulch + sphagnum moss). Should I throw this piece of grapevine out or can it be salvaged? Do you have any advice on how to get rid of the mold or prevent mold buildup it in the in the first place?