Yesterday when i was filling the bike up, i was getting the nozzle over into the tank and some petrol flung out and landed on the clear screen of the sv650s, I washed it off straight away, but it has still left cloudy patches. In the manual it says use a non abrasive plastic polish? any ideas on a brand? or will repco, supercheap stock something like that? or any toher ideas on how tog et it off?