A few months ago the rocker switch for the inside dome lights seems to have dropped in position. Now the lights do not come on when you open the doors. You can push the switch manualy and it will start working. I figure some plastic up there must've broke. Anyway, how do you remove the cover unit to get to the switch? I can pry the edges of the cover just using my fingers but I think there are screws under the light lenses so the lenses need to come out first. Am I right? How do I get the dome unit to drop down? Thanks!