Citroen c elysee Headlight Removal

Hello, my headlights are sweating, I will remove the headlights and make them silicon, but I could not,
Does the bumper need to be removed? Or is there a knack I don't know?
I would be happy if you help.

I don't know your vehicle, but generally no headlights come off without removing the bumper

Thanks for the information, I started to think so. I removed all the screws, I could not remove them, I think we will remove the bumper.