TL;DR

Linus and the team discover that using actual pool water to cool their LAN Center gaming rigs—while fixing corrosion issues—has unleashed a funky, bio-growth problem in the loops. They teardown every pool-cooled PC, inspect the goo, and try all sorts of fixes (yes, including a UV “Death Ray”) to flush out whatever’s living in there.

Despite some hopeful results, the mystery gunk proves stubborn, so they keep tweaking cleaning methods and parts until those splashy cooling cycles finally stay fresh and odor-free.

Watch on YouTube