Everyone Reaches for the Bottle: Why Your Drain Gurgles Instead of Draining

https://online-wiki.win/index.php/That_Slow-Draining_Shower_That_Changed_How_I_Test_Water_Pressure_Across_the_House

You twist open the cabinet, pour the glowing blue liquid down the sink, wait for the fizz, and hope the gurgling stops. That’s a familiar scene in thousands of homes