I'm Andy, from Hardware Recommendations.
As the question stands, it should not be migrated to Hardware Recommendations.
The question, as I understand it, is:
Are there any lubricants that are safe to use inside a laptop?
There is also an implied:
What lubricant should I get?
This is not on topic. Lubricant is not hardware. Our Meta post on What is Hardware? has this to say:
Hardware is any primarily electronic item that can perform more than one task, designed to interface with, connect to, or be, a primary computing platform in day-to-day operation.
A primary computing platform is any primarily electronic item that can perform meaningful tasks on its own with minimal external support, and designed to be operated by a user, consumer or professional.
Lubricant doesn't fit this.
If you are going to change it to a question about what replacement fan to get, then you need to add more details about the laptop. Make, model, size of fan. A broad question such as "What fan should I get?" will be closed. If you've narrowed it down to a small list of fans you are considering, we can help. If you have unique requirements for your fan (ie. it spins and sings a jingle, but only on Tuesdays after a full moon), we can help. But, simply asking for a fan that fits your laptop will not work.
Finally, your question sounds like a technical support question, so I urge you to rework it, because we don't allow those either.