How to check for leaks on Cooler Master B360 in MX ATV?

I saw water stains on my Cooler Master MasterLiquid B360 Core ARGB during long Apex sessions. Wiping them didn't help; they reappeared. I used GamePP Hardware Sensor Page to monitor pump pressure and switched speed from Auto to Manual 3000 RPM. Pressure stabilized, and water temp dropped to 35-40℃ per GamePP. The seal integrity is maintained. It's a critical switch for safety.