If your radar sensor gets covered with bugs or dirt often try this

[Tek_Freek]

Buy a pack of screen protectors for your phone. Cut a piece of cardboard or paper to the shape of the logo covering the sensor then use it as a template to cut the screen protectors. Store them in your car.

Put one on and when it gets covered with bugs, dirt, etc, peel it off and replace it.

 

[Mowcowbell]

Another option is to use a non-abrasive spray wax on the emblem. I use Meguiars Quik Wax which allows bugs to easily wipe off the surface.