What is the best way to kill mold before you spray on Homebiotic to prevent new mold from growing? Ben Prasser Updated May 09, 2017 20:41 Follow Use diluted vinegar in a spray bottle, and then wipe the area down with a towel. Related articles If there is mold inside the walls, will the Homebiotic penetrate through the walls if I spray the outer sufaces? Does Homebiotic remove mold odors and spores? What are the ingredients in the Homebiotic? Via Email Brain Octane Oil vs. XCT oil Comments 0 comments Please sign in to leave a comment.