Greetings,
Rub a wet cut potato over the surface and then polish dry with a soft cloth
Bob Heath visors, you've got a memory

You'll be wanting a Jim Redman turbo visor next

I stopped smoking cigies and use an open face helmet so neither option is of any use to me now
Leave a gap at the bottom of the screen, relax and slow your breathing through your nose helps best
TTFN
Hugh.