as above, what have you tried? what do you use? what works?                                                                                                                                                                              

Keeping the visor open a crack at the bottom...Make sure all the helmet vents are fully open (difficult in the rain!). Use an open face helmet!                                                                                                                                                                              

On my Nitro helmets i always used Fog City inserts, which were great,  but on the Shark i have just now, leaving the inlet open does the trick......................except when i stop     So just flick visor up for a min.   I did try the miracle stick thingy they demo'd at the NEC Worked a treat inside the NEC  in a warm evironment.out on the road...effin useless.                                                                                                                                                                                 

  I have to agree with you there AJ   About the demo's   They should be made to go outside on a cold foggy morning  or better still at night   Then show us how effective these products are   I'm pretty sure most won't pass the test   Trouble is that the folk who are trying to sell the stuff rarely have to rely on it at daft o'clock to go to work   So more often than not I'm wiping my visor/specs with my gloved hand   I did see some stuff last year that looked promising but I've not tried it yet   If I find it again I'll post a link   Then you can make your own choice                                                                                                                                                                               

Fog City insert!!   Had it on for 3 years but this year the sticky stuff that holds it on lost its stickiness.  Remedy----small strips of double sided clear tape. Result:)   It cost me £30 i think but well worth it, unless you are in the habit of dropping your helmet/swapping visors.  Never tried the sprays so cant realy comment.  Have i just missed the point of the topic?                                                                                                                                                                                

Try a pearl size drop of neat washing up liquid and rub it in completely (only on the inside), it lasts about 3/4 days and when your just done it, you get a nice lemon smell of which ever scent you use.                                                                                                                                                                              

Nowt , but I do wear an Oxford summer Balaclava with a soft aluminium wire fitted across the nose . Ya just squeeze the wire against your hooter for a good seal . The Balaclava also stops you getting a sweaty helmet . (no , on your head . Pillock)
Dusty x

Pinlock insert for me so with my glasses and the visor I do feel more like a goldfish looking out his tank

You would think with today's technology summat would actually work                                                                                                                                                                             

with ragnar on this                                                                                                                                                                             

Smear a touch of shaving foam on the inside of the visor.                                                                                                                                                                               

Pledge or a simular polish.

Been doing it for over 20 years if I don't have a pinlock                                                                                                                                                                             

  Moving this to  'Bikes, Products and Services' forum                                                                                                                                                                               

My old recipe was a chunk of Pear's clear soap dissolved in isopropyl alcohol. It dries quickly and can be polished with a handkerchief.
                                                                                                                                                                             

Pin lock for me ...great invention