I've just bought a (not very old) Powacycle Riga second hand. It is a nice bike, but the previous owner warned me that the switch was a bit intermittent. In fact it turns out to be totally not working. I've taken the casing apart and can see that there is a bit of melted black casing immediately above one of the pressure switches (see photo to see what I mean). What is the best solution here. Is there a repair service I can send this to in the UK? Or maybe somewhere I can buy a replacement (was part number/description should I quote), or is there an upgrade I could fit to make a much better end product than the original. The melted plastic does give me a little bit of cause for concern - but I'm sure someone on this forum will know how to fix it. Any suggestions much appreciated. 
