Physical clean or optimizing how it runs? 

Can you add more details. Rather vague post.

Damp rag.

dry rag

Can of air

Dishwasher. Dont expect it to work afterwards tho. But itll be clean.

70dart:

 

Recommendations please

 

I recommend you add more detail such as an Operating System cleaner or physical cleaning and that you come back and explain! 😉

External or internal clean? 

Model of laptop? 

"Grease on keyboard" needs a different approach to "dust in fan". 

Dog’s plastic clam shell wading pool. Bonus is it gets the dog clean as well when he fetches it out.

”Don’t be silly mum, you know I don’t fetch.”