I suggest you get a laptop cooler, essentially a lap desk with cooling fans. That should help with cooling the CPU / GPU. This one is available on Amazon for about $25 USD.
Kootek Laptop Cooling Pad, Laptop Cooler with 5 Quiet Fans for 12"-17" Computer PC Notebook Gaming Laptop Fan, Height Adjustable Laptop Cooling Stand Laptop Accessories, Blue
As Albert Einstein said, "I could have done so much more with a Big Al's Computer!".