My brake lights were stuck on, even with the car off and locked, so I figured it is likely the brake light switch. Finally got it out, by accidentally breaking the damn thing... I couldn't get the metal retaining clip off. So here I am now, with a new switch in hand but I can't slide it on because that frickin metal ring won't come off. I've done tons of searching, and everyone's really vague on how that clip comes off. How the heck do you remove it??