Toshiba apparently updated the BIOS and used silicone to improve the airflow over the CPU on my machine with complete sucess.
I would however advise a great deal of thought and research before considering a DIY attempt at this.
Nokia 8 vs Galaxy S8
Best new design books 2017: From vintage infographics to the the psychology of type
iMac 21.5-inch (2017) review
Nokia 8 : design, caractéristiques techniques, date de sortie