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QUAILMAN85749
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I am having some problems particularly with the left shifter dropping to the small chain ring and, it seems, both of them when the ambient air is colder. I don't like using WD-40 because over time it varnishes up, so I use powdered graphite. I take the shifters off periodically and clean them in a bucket of hot water with dish soap--let it soak, blow it out with compressed air and repeat. Then I relube it lightly. Maybe I should not lubricate at all? Any thoughts would be most appreciated. Thanks! Gil
 

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Chances are that during your shifter washes, water crept into very small spaces, stayed there and has promoted rust and corrosion. These spaces are so small and convoluted that compressed air and lube doesn't reach them. Perhaps a 24-hour WD-40 soak will do some good. If it does, blow out as much of the residual WD-40 you can and lube lightly with something like Triflow. Consider never washing your shifters again.
 

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I don't like using WD-40 because over time it varnishes up, so I use powdered graphite.
I wouldn't use powdered graphite. That could get gummy if you get water/sweat in them.

I take the shifters off periodically and clean them in a bucket of hot water with dish soap--let it soak, blow it out with compressed air and repeat.
Wow that seams like a lot of work.

Then I relube it lightly. Maybe I should not lubricate at all? Any thoughts would be most appreciated. Thanks! Gil
Yes you should lubricate them. No need to do anymore than this
Ask a Mechanic: Cleaning and Lubricating Shifters
 

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I'm pretty obsessive about cleaning my bikes, but removing the shifters, soaking them... not sure that's doing you any good.

Are you certain the issue is the shifter - and not the derailleur (adjustment) and/or cable (condition/tension)?
 
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