Rad cleaning acording to Marci aka Thermochill

[sanhacker]

Seems another point to consider here is that Thermochill switched to a water based flux in order to be RoHS compliant. This was only effective July 1 of last year.

Before RoHS, they used some other flux which likely required vinegar to clean.

Sooo, if you are in the EU, you are likely getting water based flux. It depends on the age of the inventory at your reseller. Thermochill can no longer ship non RoHS goods in the EU, but I believe they can still ship them to the rest of the world. I seriously doubt they have any non RoHS inventory this late in the game.