I have it watercooled with a 420mm radiator but the temps still go as high as 65°C with the fans at full speed. I've had the card for a while and the temps have slowly been creeping up. I just recently replaced the tubing because it had a bunch of white/yellow gunk completely preventing me from being able to see the red die in the distilled water. Without taking the GPU apart, can I check for that gunk in the block? And how can I get it out?