How do you remove the headlight cover on a citroen saxo?

you need to heat the grey mastic , glue around the edges take your light housing out remove all the bulbs and heat around the edges with a hairdryer or put the housing in the oven at 150 degrees. for 10 min.. and the lens cover will prise off with a flat headed screwdriver dont forget your oven gloves if you do the latter.