Keeping Visor Clear in Rain

[Grahamm]

I've been using Nikwax Visor Proof for a while now and it works well, however I've found that its efficiency starts to drop off after a couple of hours and needs to be reapplied.

Also it doesn't seem to work so well on the sort of fine spray you get in mist or when vehicles are kicking up water behind them meaning you have to wipe the spray off with your hand and that also seems to remove the Visor Proof