2006 golf - door mirror - JustMike

Hi Fellow Motormenders,

The clear plastic cover on the indicator repeater on the door mirror of my wifes Golf looks like the bottom of the goldfish bowl - green crud and obviously beenletting in water- still works OK. Does anybody know how to take it to pieces without breaking anything ? The painted outer cover seems as though it will come off but I.m reluctant to prise it too much, Help please,

Mike