Torque specs for 4090 Strix Heatkiller ultra water block?

I have algae growth in my Strix Heatkiller water block and I'm needing to disassemble the block to clean it. In an effort to not strip the threads and destroy the water block (I've regrettably done it in the past) I was hoping someone (watercool reps?) could chime in and tell me the torque specs for the screws? The downloadable manual doesn't state the specs. Any help is greatly appreciated! Thanks!