Let me see if I have this right... "flood" or wash the shifter with WD40 then add lube. That's it? I see a couple issues with this...
- The WD40 is now in the cable housing and under the tape, etc.
- Adding the chainlube to the shifter either makes a diluted solvent or a diluted lube... with solvent
Wouldn't it be better to:
- Remove the shifters
- Clean the shifters - with WD40 or another solvent
- Flush out the cleaner/solvent
- Relube the shifter
- Reinstall the shifter