Recently while scooting through a ditch that had soft dry sand at the bottom, my front wheel bogged down and I had to awkwardly hop off the bike over the bars. In the process my bike summersaulted forward. One of those goofy moments that's hard to describe properly. Not a big deal and no injuries.
BUT as my bike tumbled forward, the right brifter went straight down in the sand which is quite fine and very dry.
Now the right brifter seems to have a lot of sand peppered through the mechanism. I was surprised at how thouroughly the sand coated everything - it even got inside the little shift indicator area.
(the finer sand there that's in focus is inside the clear compartment)
I'd like to clean this out. I can feel a scratchy sandy feeling when shifting particularly on the big lever (shifting up cog sizes). So I'm worried about continued shifting degrading the internal components and messing up the indexing.
What are some options for cleaning this out?
I'm curious to see a range of options up to and including opening up the inner mechanisms and having to reassemble the shifter. I'm not totally opposed to the latter but I'm in Zambia and it's quite hard to find road components here. So if I open it up and fail to reassemble it, finding a replacement won't be easy.
I'm wondering how well compressed air followed by lots of WD-40 would be in flushing out enough sand to avoid having to take the whole thing apart.
The brifter, a Tiagra, is stock on a 2010 Specialized Tricross. I don't see a series number but the front derailleur, also Tiagra, says FD-4503. So I'm assuming the brifter is a 4500 series.