oil UNDERNEATH touch sreen, will it come out?

oil UNDERNEATH touch sreen, will it come out?

In my bag, some oil happened to go inside my touch screen, will it "dry" or come off little by little? everything works fine, just the screen darker. will the oil worn out things inside? I took out the glass very carefully but notice that the oil actually went under the screen (that "screen" under the glass). your help will help me a lot, i'm somewhere in africa where all those costumer services don't exist. thank u.