u/Hot_Whereas8917

Hey guys, my NZXT Kraken AIO is making a constant rattling noise. When I flip the PC case 180° upside down, the rattling disappears for just 2-3 seconds but then returns immediately while still upside down. When I return the PC to its normal position, it keeps rattling. Does this mean it's a trapped air bubble, or has the liquid partially evaporated over the years?