I have a 3 yr old laptop (Thinkpad T61) which runs seemingly much hotter than it used to. It's not uncomfortable to touch, but I wonder whether I should do something about it. It does get uncomfortable if I have it on my lap (which I rarely need to do). I haven't made any mods to the laptop other than a bigger HD, and I recently cleaned up the inside (superficially - I didn't remove the fan).
Are fans items that should be changed regularly?
Edit: I use the laptop plugged in 90%+ of the time.
PS: I know that a 3-yr old laptop is old tech, but this one works perfectly so....