Mine is too, but it always has been. I had a similar thought as you a week or so ago. But, as soon as I saw the guy place the motherboard over an oven burner (shielded by a casserole dish) I decided "I'm out!"
I think I'll just wait for mine to actually break before attempting any kind of internal cleaning or reapplication of thermal paste. Worse comes to worse, I'll just but a PS3 slim down the road for cheap.