Sleep Apnea Mouth Gaurd and POOP (yes, I said poop) Breath

I too have the "poop breath" (I laugh every time I say that!).  It's really bad in the morning when I first wake up but it also reappears during the day at random times.  I'll take some drinks and then it seems to go away at least for a little while.  I'll try the soaking of my mouth guard and see if that helps.  I'll be 2 months post op on Sunday and I'm really hoping this goes away soon.  I hate the feeling that I have bad breath - AKA poop breath