Well, it just seems like there's a thin layer of liquid on top of my starter if I let it sit for even a couple of hours ... but it wasn't too much this morning, although it was still there.
Here's the starter after I stirred this morning, but before I fed it. See the tiny bubbles?
Day 5: Add 1 oz flour and 1 oz water.
So I fed and stirred and this is what it looks like right after. I see I missed a little flour from the side, but I'll get that with my next stir during the day today. I think I'm averaging about 4 stirs during the day? I'm trying to do more rather than less, but I tend to get distracted.