@jamesf1 I was there when they were doing the cleaning in Singapore, for both 2010 and 2011. An activity which (despite being at the circuit in 2008 and 2009 as well) I didn’t see previously.
Not to mention that the track was visibly a duller color on the even side in both 2008 and 2009 – and there was a massive dust plume that came up. Why is it not possible that the drivers agreed that from 2010 onwards the grid should be cleaned?
Maybe I’ll take photos of them for you next year?