Change Thermal Paste a CPU - Laptop Asus K55VD Maintenance

Maintenance video or a Asus K55VD Laptop. The laptop will be opened completely in order to change the thermal paste on the CPU and the GPU. After the other video on the channel where i clean the dust, the temperature has changed from 80 degrees Celsius in stand by to 60, but when using the laptop temperature got high and the fan was noise. I think the problem is as fallows: the dust is blocking the air, so the CPU is not cooling the right way, which also makes the thermal paste dry, this is why you should change it directly if you open the laptop to clean the dust if you haven't done this in a while (2-3 years it was in this case). The maintenance helped a lot, as the temperature has fallen dramatically, it is in stand by between 35-40 degrees, and by opening multiple browser windows with 4k videos it get to 60-65 degrees Celsius (before it got to 80 with one video and a full HD video).