12UV is our latest and greatest UV recovery fluid to be used on a PHD machine. It's capable of unclogging severely blocked print heads without damaging the head itself.  Its optimal working temperature is 45°C. 

If you have a PHD17 or 18, you can also use this fluid at temperatures up to 60°C, but only with the programs called "HT" (high-temperature). Do not run any other programs when the fluid is hotter than 45°C.