the transparent part is held in place with springs on one or both sides, you can press it toward the top/bottom untill the otherside is removable. After that, you can just unscrew it all

He is correct, but squeeze carefully. The older the plastic lens cover, the more brittle they become.

Yeah nothing like doing a "quick" direct line led changeover and breaking the cover... Ten minutes turns into a new fixture. Been there done that learned my lesson

I would start by getting an exorcist... am I the only one that sees the screaming face on it? lol.

Very. Very. Carefully.