Mystery in the Labrum House

We have a mystery here at our house.  A silly mystery, no doubt, but you know the kind when something keeps happening and you can't find the cause and it drives you crazy?  That mind of mystery.  Let me explain.

I keep getting stains and spots on my clothes.  No mystery there.  But lately I have noticed the same spot every morning.  Now, it is not just a spot that you can say, "Oh, look.  A spot."  It is more like I have spilled something on my shirt, or dress.  But it is always the same thing.  And it only comes on my clothes in the mornings.  Every, single, day!  It isn't the color of anything I eat, so I'm not spilling my breakfast.  It is kind of a green-brown-tan color and slightly moist.  And not just a spot, but it leaves stuff.  Like you can touch it and feel the stuff, like a bit of jam or something.

I keep trying to figure out what I am doing when the stuff gets there, but I never see it until afterward, and I'm not doing anything at that time.  I think back, "What was I doing," and can't figure out where it came from, what it is, or when it got there. 

I thought it might be my make-up, a little bit falling on my front. (The spot is where my chest catches dropped things.)  So I started putting on my make-up before I left the bathroom after I showered.  Sorry, no shirt on there.  But no spot left either.

I have learned in the past that I need to cover my clothes with a "bib" when I eat because I was always spilling something, but I was aware of that.  I know if I don't cover up when eating, I'll have my food on my shirt, or at least a piece of it.  But this spot comes after I eat.

This morning I thought, "I'm going to find that little bugger!"  I checked my shirt when I sat down to eat.  No spot.  I covered up, ate, took off the cover.  No spot.  I took my plate to the sink, took my meds, went into brush my teeth, looked down, and there was that spot again!  For the life of me I can't figure it out.  I can't tell what it is, where it comes from, when it gets there, anything! 

A funny thing.  On Sunday Garth had that same spot on his white shirt when he got to church, only it was under his tie!  Thought it must be from the sink where we brush our teeth, but, NO.  It couldn't get up where my spot is from there.  And it was there before I brushed my teeth.

Now, mind you, this didn't just start happening the past few days.  It has been going on for months.  Where is that spot coming from?  Any suggestions?