lol.. yeah it takes ages to get them apart. I heated in a fan forced oven at ~100 degrees for about 3 mins, used a wide flat blade screwdriver to get under the corners then slowly, and i mean slowly, start to remove the glue.
After about 2 mins the glue is soft again and put back in oven for about 2 mins. Then just keep repeating that until you can pry the screwdriver between both the back and front halves, then i used a chisel to act as a plough, pushing both halves apart. You'll need to make sure that all the clips are off before you can plough through. Took me about half an hour to an hour per light.
If you make another effort and get them apart. Make sure you keep both the lens and back half in a very dust free zone as it's a bitch to clean them properly when stuff get in them. Also make sure you mask properly too.
End result = Calais/HSV lights :yeah: