Under Misc. section look for all the recent posts under "De-oiling a Ball".
It will save all of us NuBall owners from having to post again in answer to your question.  Hope this helps.

Since it first came out; I was one of the first to test it.
I've done about 10 - 12 of my own balls and hardly got anything out of any of them. I learned later that that was probably because of my cleaning regimen: I clean every ball at the alleys before putting my balls back in the bag. I clean them at home every 15 - 25 games with Clean and Dull.

I've also cleaned may friend's and teammates balls and every time some to a lot of oil has come out of them.

I don't sand them dull before doing the extraction unless the friend asks me to resurface or refresh the surface of his ball. The oil still comes out. Sometimes it pools in the cup; sometimes it just lays on the ball until I wipe it off.

I use 125/130 degrees on Storm-made and Brunswick-made balls. I'll use 140 on most other brands. (The temp gauge is accurate usually within 2-3 degrees.) I usually do each ball for an hour first; if oil comes out, I'll clean it and put it back in for another hour. When it stops producing oil, I stop. I wipe the wet ball with a good paper towel like Bounty; then I'll clean it with LMB International cleaner and a microfiber towel. Then I put it back in for the next hour.

I just did my Storm Ride and a lot of oil came out. Wiped it down after an hour, then left it in another 30 minutes, and it was done. Had a small puddle in the catch at the bottom too. 

Did a Rack Attack grape right after and it was almost bone dry. 

My experience is pretty much same as Charlest and I think I am a pretty early user getting mine several years ago direct from maker after advice from Charlest. I wipe ball thoroughly with microfiber towel every shot and clean at home after every session with Clean & Dull. A friend who cannot get into the habit of wiping his ball after shots deoils quite frequently with his Nuball