Last week, or week before?, there were smallish plastic bottle of 3M Glass or Ceramic Protector at (IIRC) £3.99. Seemed quite a lot for not a lot - at least in terms of volume.
Has anyone tried it? Does it really make the surface easier to clean? Stop it holding on to dirt?
Or is it like so many similar-sounding products from years gone by, might have a slight effect for ten minutes before wearing off (either literally, or even that little effect stops working)?