It's A Dark, Dark Screen...

My amazing ancient Nokia phone's LCD screen is getting dimmer with a darker patch in the middle (indicated by the red rectangle below). It gets very hard to see when under brighter conditions, even on a overcast day. Still ok when under indoor lighting. Looks like I might be losing the 67 challenge after staying at the top for more than a year. Hope that it will last till the second half of this year, though.