I tried safflower oil too and it worked. I got to the point that just seeing the bottle with OO (Olive-Oil)
made my stomach sick.
When I was in South Carolina one year I wanted to do the flush and found Spanish OO, less strong, at Walmart and other stores, it is called Pompeian. I use that now with grapefruit juice, shake it well in a jar. I drink it with my nose closed, keep it closed while you breath in between and in the end I rinse my mouth with water and take a peppermint altoid. AND then I let go of my nose.