Doing a deep clean of the Panda soon and I have noticed that moss is growing behind the exterior weather strips at the bottom of the glass on all the windows! They also don't clear the window if it's wet when winding it down (water stays beaded on the window and goes straight past it!) so I want to give them a very good clean, but for that I would like to take them off.

Anybody know how to remove these? I don't want to just try and pop them off in case I damage them. Had a flick through the Haynes manual but it only says how to remove the interior one.

Drop the window down and remove the interior seal. You get more space to use a cleaning brush on the external seal. A wire handle bottle brush does the job.