Why is my Acer laptop getting hot?

Question

Do it yourself

The Acer Aspire 5742 laptop, a year ago, started to warm up, gave it to the service, replaced the thermal paste, stopped warming up.
Now I started to warm up again, I want to clean and replace the thermal paste myself, because I already have experience in this.
I know about the fact that the bolts from the cooling system need to be unscrewed in a certain order.
I watched the video
https://youtu.be/3WkXQm02BdM
Please tell me:
1. What tape is he using at 9:15 min. and which one is better to buy and where in the EKB?
2. What oil is better to lubricate the cooler? I don’t have a car as unnecessary, and it’s a long way to my friends, so it’s easier for me to buy specialized oil. (again, where to buy?)
3. What is the best way to degrease the surface and what should not be done during this process?
4. How to apply thermal paste correctly (it seems to me that the man in the video did not apply it correctly)?
5. What thermal paste do you recommend?
6. Your advice.

Answer 1

1 regular plaster
2 none. because unlike machine mechanisms, there are no anthers on local bearings, that is, dust when mixed with oil will give a notable porridge that will slow down the fan speed and, as a result, increased heating and wear of the cooling electric motor.
3. Clean the area of ​​the crystal with an ordinary rubber band. Kohinoor from stall
4 is quite suitable. The smaller the better. Even thin layer.
5 There is not much difference. Alsil some.
6. Be careful. At 9.15 the person says it's a band-aid.