If it's not overheating but just running a little warmer than you would like, try diluting down your coolant a little with water to see if it helps. Standard mix is 50/50, try 40/60 or less. More water/less coolant is more effective in cooling. Also, as already mentioned here, look for fine debris like lint or dog hair on the front of the radiator behind the condenser. You'd be surprised what you find there, and might be losing up to half the cooling capacity. You wont' be able to see it unless you remove the radiator as the debris accumulates in a circle in middle.