I woke up last Tuesday to a puddle around my toilet base in the bathroom. Thought it was a leaky seal or cracked bowl, got all paranoid. Then I remembered the flapper was old and letting water trickle down the overflow tube all night, making the tank ice cold. Replaced that $3 flapper from the hardware store on Wednesday and the sweating stopped completely. Has anyone else dealt with phantom condensation like this, or was I just overthinking it?