I used a hair dryer when i did mine and DanG's and put them back together using a bit silicone sealant, so far no goldfish in mine or Dan's. if i remeber rightly there's at least 1 or 2 hidden screws behind some foam padding on the back of the headlights just to keep you on your toes
I kept on blowing the Silvertec ones and the light they give off i thought was a bit wank so i've got yellow bulbs in from a Toyota dealer as the price of them from Subaru is silly, see pic below, not full on clear but better than before