Well, apparently I spoke too soon.
I thought I had smelled a urine smell in the bedroom the last couple of days but couldn't find where it was coming from. I had checked the bedspread corners (which were the usual first choice) but didn't see anything.
but apparently that was b/c the room has no lighting. I opened the curtains this morning and when I came back from the bathroom I smelled urine again. I looked closely and saw a huge pee stain on the one edge of the bedspread. Since Gunther doesn't mark I know who it was.
Who knows how long that was there?
So now I am wondering if he's doing this at night? In the mornings before I wake up? he isn't allowed upstairs by himself (b/c of this problem) so I don't see how he's doing it in the afternoons when I'm home.
and unfortunately in his case he doesn't care how many times I catch him in the act. I think he's mentally challenged.
I caught him in the act a few times when he first started at my parents. Unfortunately he remembers for about 2 min and then gets over it.