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Dobsonian is jerky when moving vertically.
Dobsonian is jerky when moving vertically.
My dob has 2 small Teflon looking squares per side I've never owned one before its 2nd hand is the 2 squares the normal amount.
What can I clean it with to try make it smoother. It's not smooth at all and hard to use when using higher magnification.
Is it better to just replace the Teflon
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