I'm trying to get markes left by a plastic duster off mine. The OH hasn't noticed them yet as he'd probably go nuts that his 42 inch baby has a mark on it at all.
I tried screen wipes on the laptop LCD screen and that made no difference to the marks, which were more like dirt on the laptop so I hesitate to use it on the television.
I'd love some advice too, Berlin hope I didn't step on some toes adding my query as well.
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I've found that these are excellent for getting rids of marks on other things (e.g. carpets, trainers etc) much better than many other specialist products.