I thought our stomachs naturally produced some kind of acid to help break down foods for digestion.
We were so tickled to get anything that was brand new, that we wouldn't dream of hacking it up.
The stiff new jeans were washed and washed the first few times to soften them up before wearing.
Don't know what anti-freeze does to clothing, but I do know that battery acid will put holes in denim.
This is the first time I've heard of Coke (does Pepsi work as well?) being used as a fabric softener or window cleaner.