I've never done scrap vinegar as I felt I got a better product with apple cider. I've made apple cider vinegar several times successfully. I never used any high tech stuff just jars and butter cloth NOT cheesecloth. Here's the posts:

https://steemit.com/homesteading/@goldenoakfarm/making-vinegar-november-15-2018-goldenoakfarm

https://steemit.com/homesteading/@goldenoakfarm/vinegar-done-november-27-2018-goldenoakfarm

I have to make more vinegar this year and learned of a new orchard nearby. I hope it is an organic orchard. If not I will have to go to VT for apples again.