The rear mech on one of my bikes has become arthritic, as in the cage does not tension the chain properly when in the little ring and lower five cogs. I have sprayed with a dry ptfe lube and manipulated so it eases, but the problem comes back if not been on the bike for a week or two.
Anybody got any ideas how best to solve this apart from replacing or regular lubing.
Never had this before in a rear mech and been cycling for longer than I care to remember.
Thanks in advance.