Skylight above shower

I must say on my fifth wheels skylights, I win the KISS award. I unscrewed the cowling and pulled the light down and used a 33 Gallon black trash bag folded neatly in half. I laid this upon the skylight and screwed it back in. This blocked heat, light, and UVs that fade the heck out of your shower. Then when I traded it, I pulled the trash bag out. Looked stock and pretty until the new owner will post on RV.net trying to figure out how to keep the light and heat out.

Bill