hi philip, I have been using the mixture in the CPU loop for a good 1.5 years and the red version of it in the GPU loop. I recently cleaned the loops and replaced the fluid. With Cloud White I had practically 0 deposits. I disassembled the entire loop, including the cooling block, and was really amazed at how clean everything still was. It was a little worse with the red colour, but that varies depending on the colour. But even there, there was almost nothing that couldn't be removed with a little scrubbing with a toothbrush :)