You wouldn't.SO why use WD-40 as a cleaner since a gallon of Kerosene is cheaper than a little spray can of WD-40?
WD-40 doesn't damage the o-rings and it doesn't damage the chain. It cleans the chain. Anytime you clean your chain there is the risk that you removed the lube in the o-rings. This is why you always lube your chain after cleaning it. The manufacturer's statement regarding WD-40 is just to cover their ass because of the misconception that WD-40 is a lube when it is not. Since they can't be sure everyone is going to relube their chain, they put out the statement that their product may not be safe for chains just to cover their ass.Huh? The manufacturer is saying that the lube that comes packed inside a sealed O-ring chain can be diluted by the penetrating quality of WD-40. I don't care if the stuff damages the O-rings or the lube behind it or what. If it damages the chain from using it then it will not touch any of my chains.