I have a little annoying rattle in my dome light and I want to take it apart to see what is loose. When driving, if I push my hand on the right side of the dome light, the rattle goes away. The service manual says to just pry it off, but when I start prying, it feels like I am about to break the whole thing so I gave up. How do you do it without breaking it? Do you pry just the clear platic lens or the whole thing? Thanks.