Hi all. I need advice on laptop cooling.

I am using an ASUS A43S running on Intel Core i7 -2630QM, 2.0GHz and nVidia GeForce GT540M 2GB. I use it for some mid-range gaming. Before this I did not use any laptop cooling pads or fans and it was all cool, but understandably after prolonged use it's beginning to show signs of heating up recently. I am guessing dust must have piled up on the internal cooling fans.

I do not know if there is such service but I have thought of taking it for cleaning. However people advised me to just get a cooling pad. But after reading through this thread I am having doubts. The A43S's ventilation is located at the side of the machine, not at the bottom. I'm not sure as to how effective a cooling pad would be. I have tried making the laptop stand like most people advised, but I don't seem to notice a drop in the temperature, or maybe I'm just too paranoid?

I need advice. I am worried that I would burn out my laptop. What should I do? My budget is around 300.

P/S: I am an online gamer, I usually leave my laptop on over the night, also for download purpose. My room is air-conditioned though.

Below I have attached snapshots of my laptop and a screenshot of my Speedfan readings while not running anything, in case you need to know if it is really overheating.

Thank you. Thank you so much.