Well if your talking about physically you could get some compressed air and blow it out. Or if your talking about performance you could try to re-install the os you have on it or replace the hdd with a ssd or higher performance hard disk for it to run like new. :)
Answer:
Dehydrated food that is vacuumed sealed.
Explanation:
Dehydrated food is not hard to make and holds the nutritious values needed for a human to survive. Dehydrated food can last up to 1-2 years if vacuumed sealed.
