I just picked up some very nice barrels that had olive oil in them. Soap, hot water and a ton of sloshing and rinsing got them very clean including the smell, but there is a very thin residue left behind when I run my finger inside the bung.
I'll be cutting a hole in the side of a couple of them to make dump stations and I'll be able to reach in and scrub those out, but I'd prefer not to cut the others. What could I use to break down the oil without being able to reach in and scrub the inside?
Will vinegar work or will that make things worse?
Sean