Please could someone tell me what they mean by a 'dirty screen'? On light pictures and on pictures of a uniform colour (such as a football pitch), the picture on my FX68 is slightly grainy and foggy. It's as if there's a faint mesh film over the screen and it occurs on both pre-recorded DVDs and aerial footage. There are also two faint vertical bands down the left hand side of the screen (each about an inch wide), which are also very noticable on lighter pictures. Are these just 100hz side-effects or does my TV have a fault?