2. Have you used it for more than a year? Notebooks generally run at a higher temperature, so the effective use time of silicone will be shorter. It is suggested to clean the old silica gel and replace it with a new one to see if it can solve the problem.
If it can't be solved, it can definitely be treated. Please show it to a professional for careful examination. Some really undetectable questions will ask you if you want to modify the cooling system slightly.
I hope I can help you.