No i haven't will try that when i get my hands on some!

Have you tried removing the bottom panel and blowing out the vents and fans with compressed air?

may be too much dust stuck in the radiators, or a total block out

follow the official dell service manual for m15x(you can google it), clear the fans vents and radiators. that should solve this problem

Hi,

Cleaning the vents is a good practice, also, here's an article with a few recommendations:

Alienware Laptops: Computer overheats, shutdown when running intensive applications

I managed to get my hands on a can of compressed air. Cleaned out the vents but the heat still seems to be an issue.

Any ideas on what else i can do?

This may sound like I'm treating you like a child, but you really would be amazed the number of people who make this mistake.

Did you unscrew  the laptop base, and blow the dust out of the laptop, and the fans ? You may find you need to pick some big chunks of dust out with your hands, otherwise it ends up everywhere when the air hits it heh.

On mine you have to unscrew the fans to clean them.

If you didn't open the laptop, all you did was blow the dust and dirt INTO the laptop making it worse.

Thanks for the reply Cenobitez! Yeah i did that, unscrewed the fans and everythng but the temp was still quite high.

I emailed the dell technical support team and they said it might be a heatsink issue. (for them to replace it, it will cost £130.. i dnt have that much money lying around as im a uni student)

Was wondering where if there are any places where i can buy a heatsink?

Thanks