Hi @kialzi
Here's the hardware maintenance manual for the laptop.
Go to p.42 in the manual (48 of 68 pdf) to view the procedure to remove/replace the thermal module.
Once it's removed this will allow you gently clean the fans away from the other components inside the laptop.
Also once it has been removed, check the condition of the thermal paste on both the CPU and the GPU to make sure that it hasn't dried out and needs to be refreshed.
Here's the ifixit How to Apply Thermal Paste guide that may help with this.
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