Verified answer

I took care of a baby squirrel once, right after Hurricane Ike (it was almost dead in our driveway). I used warm cow's milk to feed it, and it actually seemed to like it. Since the one I had was a baby and I was the one who raised it, it didn't bite me. It always seemed to entertain itself. It would be rustling around ALL the time in it's "cage" (a bucket with newspapers and a metal grate on top; there were no pet stores open at the time and we didn't have power for the next week.) Do NOT let it loose in your house, especially if you have any other pets. (plus, they can tear a lot of things up!). If you are looking for a grown up squirrel, do NOT do this, unless you can find one at a pet store, which is very unlikely. If you already have a grown up squirrel, please please let it go.

P.s. Mine didn't stay close to me (physically, if that's what you are asking.).

You can't keep Squirrel's as pets.. Though I'll answer those questions.

Pet them gently and stroke them.

They are primarily vegetarians, living on seeds, nuts, fruits, fungi, lichens, buds, mushrooms, roots, pine cones, leaves, twigs and bark. They do not normally eat meat. However, if faced with hunger they have been known to eat bird eggs, snakes and insects.

You can't train a squirrel so, it can't be "clean."

YES IT BITES.! If it's wild. If you get bit you can receive rabies.

If it's wild, it probably acts friendly when you feed it, but if you don't... well let's just say it's normally not friendly. It does not stay attached to it's "owner" it's a wild animal. Not trained to be trained.