Something like a Fog City visor insert - effectively makes the visor double glazed and prevents fogging.

I used to use shaving cream (applied and then wiped off) on my swimming goggles when I used to do a lot of swimming.

We tried shaving foam last year and it failed miserably.

I spit on my snorkel, I dont suppose that would be an efficient way of keeping your windows clear though

I know spit works on scuba diving masks.... as does the previous poster who I didn't read before posting

Rain X Anti Fog does work, used it on my car in the UK, never needed it in Canada though.

Open the side window a bit.

Washing up liquid trick does work on bike lids. It does tend to scratch a visor a little over time though.

On a car, apply some to the inside of the windows and buff with a clean cloth, you should be able to see that there's a hint of it left on the window (you don't want to buff the whole lot off!).

I used a spray on my lid visor when racing. Worked perfectly, especially during pre-season testing when it was a bit chilly. Forget the name though i imagine it would work well on a car screen.

I used to use one of the visor inserts, what did you race? Here's my old R1 at Mallory



(apologies for the thread drift)

Nice. Always raced supersport on GSXR600's and CBR600's. I miss it.......my bank account doesn't.

Tell me about it! Good times.