The previous owner swapped my front foglights with Xenons - Yes I know but actually they are extremely useful at night as the 'follow me home' lighting lights up my garage brilliantly. as they are brighter than the sun! Twice they have both stopped working, after removing the wheel arch liners and accessing the wiring loom I have discovered that the pins inside the plugs had badly corroded. All pins turned light green. A month or so ago, I managed to clean off the pins with bathroom descalers which worked fine until yesterday. Any ideas what is the best thing to completely clean the pins? they are tiny so getting wire wool in/tin foil isnt really possible. I have re-located the loom to prevent any water getting on them in future.