So boring as!
Omg...
My family forgot paying an internet fee for this month, and a wifi router had been stopped for a few days, until last mid night.
I was too bored without Internet, so was taking a maintenance of my skateboard.
Using paraffin oil for cleaning up some parts...
And after I cleaned everything, the oil got some dirt in it.
Then just dry the parts, and put small amounts of oil in barreling parts.
Done!
Thank you