How to remove oil stain from clothes

I HAVE A SPOT ON MY FLAT SCREEN.IT'S CLOUDY BLACK SPOT.ALMOST LOOKS LIKE BLACK PAINT WASHED OUT WITH WATER.I THINK MY GRANDCHILD SPRAYED TV SCREEN WITH WATER BOTTLE.CAN YOU TELL ME WHAT TO DO

First, wipe out any excess crumbs. Then fill a microwave-safe bowl with about 1-2 cups of water. Add some lemon juice, or put in half a piece of fresh cut lemon (squeezing some juice out first) into the bowl... Microwave until the water is boiling. Then let it sit for a few minutes to let the steam penetrate the interior. Carefully remove the bowl and interior tray. Wipe down the interior with a damp cloth. Wash the tray in the sink with dish soap, dry, and then return to microwave. For the outside, spray with a kitchen cleaner and wipe with paper towels. The main idea is that the steam from the water will loosen food particles, and the lemon will add a fresh smell.