Mayhems - Water Cooling PC Cleaning Kit - Blitz Complete - Radiator and Coolant Loop Cleaning, for Initial Setup and Coolant Change

The best loop maintenance kit. Period. Cleared my radiators of left over dye I thought I’d already cleaned. It cleared the buildup on my distro plate as well. It’s the gold standard for loop maintenance

I have been using Mayhems Blitz since 2018. I run opaque coolant in my loop, which leaves a bit of a residue over time. This is because the chemical used to make the liquid opaque centrifuges out and gathers in tube corners, and anywhere that has "filter" points. This means the radiator will get gummed up a bit. This cleans it out perfectly every time. Now using Part 1 does require the radiator to be free of debris. So I actually do a fill and shake 3 - 4 times to ensure most of the opaque chemical is out before using Part 1. I then follow the instructions exactly. I also clean my loop every 6 months religiously to ensure it doesn't get gummed up very bad. I run Part 2 for 12 to 15 hours, then run RO water, changing that hourly until the loop runs perfectly clear. It actually takes what they recommend of 3 times but I have had to go a 4th or 5th when I still saw color. When I am done, my temps drop 10 to 15 degrees and I can push my overclocking further for about 4-5 months. Mayhems cleans my loop perfectly. One note to consider is I have a copper radiator, which Mayhems works beautifully on. Be sure to check your manufacturer recommendations if Mayhems is compatible, because some aluminum radiators may not respond well.

The rad cleaner was great, but that's where the praise ends. Used this to clean out a new loop that included some secondhand parts and the instructions just said to rinse it through with distilled water, which I did. When I then added my coolant I got this green sludgey build up which I think was a chemical reaction with some cleaner still left in the system. Why would you create a product for cleaning loops with coolant in, that reacts with coolant and creates this gunk? It blocked my pump and other parts and I've had to take the loop apart multiple times trying to get rid of it all.