Just want to add that brake cleaner might a little harsh on the rubber orings, use automotive MAF or electronic cleaner is a lot safer and still get the dirt out. You don’t need to slide all the washers out if you don’t want to. Another way/better to do it is borrow your wife’s ultrasonic jewelry cleaner if you want ultra clean. I’m not sure about adding oil or lube to the washers. I think they are supposed to be dry.
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