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I show how to repair stiff, gunked up bicycle shifters that aren’t shifting well, or at all by cleaning out the old dried out grease using and ultrasonic cleaner. The old grease can be thick like glue and just gum the shifters up so they don’t work, or move really slowly. So you want to remove the old grease and add some fresh lubrication. These are mountain bike trigger shifters, but it also works for brifters (integrated brake/shift levers). The I bought the ultrasonic cleaner I used in the video from Harbor Freight. The LA’s Awesome Orange degreaser came from the Dollar Store. Then I lubed the shifters with Tri Flow.