It'll be the rear light gaskets, its common on focus's after hitting a pothole
If you spend the next 3 weeks rubbing sticks together to make a special tool,
You could remove the lamp cluster and make your own sealer from a recipe passed down from the ancient greeks to a close family member
Or you could just listen to what people keep telling you,
Or even better tou could stop trolling the place with the same stupid posts day after day,
What we on now? Day 2 post 2 of the knocking?
Exact same as yesterday, amd prob the same as tomorrow