Welcome bomaguy,
Phlegm? scraped dried skin? Jeez.
To be perfectly honest, it sounds like it would have been less disgusting if she had marked her territory the old fashioned way; you know, the way dogs do it.

When I was a kid about four or so I took some of my brother's model airplanes for test flights. These were not the kind designed to fly and needless to say they came out somewhat worse for the experience. I never heard the end of this. Thirty years later he would complain that I had broken his model planes, and he was serious. Now bear in mind I was so young I don't even have a memory of doing it, let alone had any malicious intentions. Four year olds think model planes can fly for crying out loud!
Well, a couple of years ago, after we had a serious falling out and were at the beginning of our present conflict, one of
my old model planes that had been sitting amoldering away in a drawer for thirty years at our parents house suddenly appeared on his kitchen table. He was gluing broken parts back onto it.

I never said anything but considered it a hilarious attempt to simultaneously mark my possesion as his and right this inane grievance he has apparently been nursing since we were in short pants.
I'm just sittin' here cracking up about it. What a life, to spend forty years waiting to deliver a devastating blow like that

for something a four year old did.
Count your lucky stars you're rid of her. You say you've only been out of the relationship a few weeks and are still somewhat obsessed with her on the other thread. You may find you are more strongly effected as time goes by. A year is time enough to be strongly effected.
mudpup