I thought we had a discussion on this not too long ago?
Anyway....read this
http://www.reginachain.it/eng/use_and_m ... 3.shtml#01
Cleaning
If the chain is not too dirty, the operation of lubrication is normally sufficient to clean the chain.
When the accumulation of dirt on the chain (sand, mud, asphalt particles or other foreign materials) is excessive, the chain must be
washed with a brush and kerosene. After washing, the chain has to be dried immediately with a jet of compressed air.
After off-road use, when the dirt built-up is heavy, wash the chain with a water jet, then dry it immediately with compressed air.
WARNING
• Avoid the use of
steam, gasoline or solvents.
When cleaning O-Ring chains, avoid the use of hard brushes or other methods that could damage the rubber O-Rings (compressed air should be kept at 50 cm/2 ft distance minimum).
• After washing, immediately lubricate the chain as explained in the next chapter.