Originally Posted by
joeync
Thank you for replying, the suggestions were helpful. I managed to free up the shifters with de-greaser. The front ring shifter is still difficult to shift, in particular you need to apply a lot of force to the shifter to take the chain from the smaller rings to the larger rings. Are they ways to make this easier? Should I now put some fresh lithium grease into the shifter?
Did you inspect the cable heads, especially on that left?
Use a spray lube or drip lube. Don't use lithium grease as it reacts with WD40, which might already be in there or might get used some day.
Is the front derailleur moving smoothly, or does it need oil?