I had the same with mine and as Warwick says, I followed the first video
https://www.youtube.com/watch?v=Cy7zk5i ... e=youtu.beand it works a treat after that. Toook me about half an hour to get the stalk off.
If you can't be bothered cleaning them and want a nesw stalk then you can get one from Ebay. ( pat part ). just search "citroen c1 indicator stalk" on ebay and you can follow the video to take the stalk off etc. The hardest bit for me was taking the screw off on the bottom of the steering coloum plasstic trim. It's a rid sod as you can't see it and need a long philips head screwdriver to get to it.