Incredible squeak

Actually, I was the chair very much, have built it in about half an hour and there were no problems, everything is very simple. However, what is bothering me scary that this office chair two days (today is Sunday, it was delivered on Friday) after building already terrible squeals and thereby driving me insane.
Otherwise it sits but quite comfortable and I just arbeitsbeitsbedingt the 10h a day or more on the chair seats, I can quite quickly make an impression. I would probably five stars awarded when this vile squealing would not, because I am very satisfied otherwise. But as already stated, the sounds maddening.
Will probably need to buy an oil spray tomorrow.

Greeting