SKIN CARE QUESTION :) please answer?

ok so i have pretty bad dry..flaky(shudder) skin on my face and i recently found a small metal tin of nivea creme..blue and white i was wondering seeing as it is very think and..greasy do you leave it on or do you have to wash it off..i have been leaving it on..im not sure
can anyone help..?
THANKSS
XooxXo