I must be the world's least mechanical person, but I bought Sylvania's new Silverstar replacement bulbs for the headlights on mt Jeep Wrangler because the stock bulbs are not bright enough. I've followed the manual's instructions, but can't seem to disconnect the old bulb. The red locking trigger doesn't seem to "unlock". When I go to pull the unit and bulb out nothing happens, and I'm afraid I may bust it if I pull too hard. Any suggestions?