I would definitely NOT use white vinegar....you DO want to use the Organic RAW Apple Cider vinegar, like Bragg's.
In my opinion, the Hulda Clark information is outdated. I may be wrong but I don't believe she knew about or addressed BIOFILMS with her treatment protocol, but I may be wrong as I have not read up on her treatment details. All I know is that it is working for me very well. I also put a few drops to a half-teaspoon of extra virgin olive oil in my fiber shake so this also helps to release and glide the biofilm out! I also drink some cranberry water (pure cranberry juice mixed with water and stevia drops) between meals to help flush out the biofilm. Cranberry juice helps prevent the bad muck from being able to stick like glue to your intestines! But the thing that really knocks it out is RAW GARLIC!