How to clean Corsair XG7 waterblock fins?

I have some built up gunk in the fins of my Corsair waterblock after using Corsair's own clear red fluid. I got it taken apart, soaked the fin array in 91% isopropyl for about 4 hours then scrubbed with an old toothbrush. However, that only got off about half the stuff. Any suggestions?

Answers

We love seeing what our customers build

Submit photos and a description of your PC to our build showcase

Submit Now
Looking for a little inspiration?

See other custom PC builds and get some ideas for what can be done

View Build Showcase

SAME DAY CUSTOM BUILD SERVICE

If You Can Dream it, We Can Build it.

Services starting at $149.99