I'm so sorry if this is covered like a million times but I've been unable to find a response either by searching here or on Google.  What exactly is blue toast?  I keep hearing about asian providers doing the shower and then blue toast.  What is that?

Mouthwash. (Spit, don't swallow.)  

OMG I just smacked myself on the head.  DUH!  I even described it in my reviews. Thanks for enlightening this ijit.

awesome pic... Ha!