In the old style helmets, without the removable liners, the easiest way is to put the helmet in the sink. You'll need to have a spare, or not ride for a coupla days. Fill the sink with cool to lukewarm water, and Woolite or Zero (some sort of delicate clothing detergent) in a weaker than instructed amount. I normally use half of what the instructions say. I close all the vents, but you can open them if you like. Remove the face shield. Dunk helmet in sink and scrub the liner with your hands through the opening in front. Rinse well, at least twice, and then remove. Squish the liner lightly to get excess moisture out. Set on a drying over the sink or in the tub. Once it stops dripping, set in an area with good circulation to get the helmet to dry properly, out of sunlight and heat, or the liner may shrink.
Originally Posted by N2OACCORD
In a couple of days, you should be good to go. I have used this after Willows Springs, when the helmet reeked because it was 35 degrees out. No smell whatsoever, except a nice fresh laundered scent.
I guess there is no easier way (spray on wipe off). Thanks for the quick response.
Originally Posted by 2wheelsx2
Dust with baking soda and vacuum. Gets rid of any smells. Not sure what you mean by 'cleaning'. You shouldn't ever need to clean the liner...
If you don't find the stench nauseating, try Febreeze. Works well to de-odorize fabrics, but the smell may be too much in a helmet.
This post is simply the opinion of the poster and is not to be construed as instructions or advice. Your mileage may vary.
I rode Deal's Gap / The Dragon in September 2007 and I visited Yellowstone in August 2010. Where have you been?