I took mine out today. It was somewhat difficult and did it by hook or by crook.
With your head in the dishwasher lever out the left side of the screen with your fingers the left side is under a small tab. Then twist the screen to the right. Next pull upwards. When inserting it back into the machine work in reverse putting the right side in first pushing quite hard to insert it back down into the position you pulled it from. Then reinsert the left portion into the groove by slightly bending it. Good luck, it was difficult.