I remember when I was an apprentice back in the 70's, there was a tapping fluid called Tap Magic. It was a very thin cutting fluid that worked better than any tapping fluid on the market. Our company bought it by the case. It also came in a version that was for Aluminum only. It worked equally as well. Taps lasted far longer, and we broke very few of them. Both tapping manually, as well as in tapping in the machines with tapping heads.
Then in the 90's someone at the EPA decided they had to change the formula because of the environment. I'm not sure, but I think it contained Fluorocarbons which were supposedly destroying the Ozone layer. Anyway the new stuff wasn't, (isn't) worth crap. It doesn't work nearly as well. So much so we stopped using it. The EPA has destroyed the effectiveness of so many good products it's ridiculous. One way or the other we pay the price for all of this. Just look at the amount of Termite damage in homes and businesses since they banned Chlordane.