Stop in for a cup of coffee

Yeah, I wasn't suggesting it was flooding as much as I was suggesting that the A/F idle mixture is changing with temperature. Things like PCV and vacuum leaks can to it.

It is also possible that the timing is changing as it gets hot. Sometimes the advance springs expand and loosen with temperature so that the advance comes on earlier and raises the idle speed. If your curve is set to come on at 1200 RPM and then when hot, it changes to 1000 rpm...idle speed will go up. You can check the advance curve with a timing light cold and hot and see if it is changing.