Jonny essex said:
I have no idea how to do this!? :?
Remove the inspection panel in front of the rear wheels using an 8mm and 10mm socket - 2x8mm bolts and 1x10mm nuts visible and 1x8mm bolt underneath.
Feel inside for a black rubber cap. This is attached to a bit of plastic tubing. If you are struggling to find it, pour some water on the soft top and it should come through the tubing. Once you have located it, pull both the tubing and rubber filter off. You will probably find a load of gunk in the filter, give it a wash. Get some curtain wire or somethign similar and poke around up in the tube, wash some water through whilst doing this.
Once it is all clear from debris, put it all back together again.