Shoein sivuilta FAQssa:
How do I clean the helmet properly?
Inside:
All our interiors are washable! If you own a helmet with a detachable interior, just remove it and wash it in lukewarm water. Please use a mild soap. If your helmet is not equipped with a detachable interior, please put the whole helmet into lukewarm water. After washing, the helmet must dry without the use of any drying tools like hairdryers, etc. In a warm and dry environment the drying time should take at least 48 hours. But again, PLEASE DO NOT USE ANY DRYING TOOLS as they may damage the inner liner of your helmet.
Outside:
Please clean the outside of your helmet with water and a mild soap.
As Shoei helmets are painted, it is also possible to use car polish to keep the paint in a good condition.
Please do not use cleaning sprays or liquid window cleaner as they may damage the polycarbonate parts of the ventilation or your shield.
Shield:
It is very important not to use any cleaning sprays or liquid window cleaner on your shield. Please clean your shield only with lukewarm water and a mild soap.
Tip: Put a wet towel on your shield, leave it there for some minutes and insects can be removed easily.
