Items Needed:
1. Laundry Sink or Bathtub
2. Gentle Laundry Soap (i.e. Woolite)
3. Towels (2)
Estimates:
Time: 15-30 minutes to wash, 24-72 hours to dry.
Step 1 - Remove the visor
Helm
Step 2 - Place towel in tub
You do not want to scratch your nice helmet, do you? Make sure you put the drain plug in first.
towel in tub
Step 3 - Measure out some of your favorite delicate laundry detergent
Detergent
Step 4 - Fill the tub
Tub
Step 5 - Wash the helmet
Squish the soapy water through the pads and the rest of the helmet. Open your vents and let some soap drain through them as well.
Wash the helmet
Step 6 - Drain
Drain
Step 7 - Rinse
Rinse the soap from the outside, vents, and inside. To get the soap out of the pads, squish the clean water in them repeatedly. Be thorough
RInse
Step 8 - Drain
Hold it like this for a bit to let much of the water drain out.
Drain
Step 9 - Dry
The best for way for a helmet to dry is on a dish rack like this one. It allows air to circulate to let it dry faster.
Dry
Sumber : http://www.sportbikeguy.com/garage/floor/lid-inside-clean.html