Focus on the two smaller oval mirror sections on each end. There is an AC inlet underneath each of those. You need to pulll those down to access the AC inlet to clean the intake air filters as they may be restrictive and causing cold air to back up and circulate down onto the morrors making them cold causing the condensation.
The center mirror doesn't need to be removed.
The colored fabric oval on the wood ovals is held by velcro. Pull down on it gently working around the edges. it will come off and land around your neck.
Underneath there you will find the head of long wood screw or long drywall type screws. A #2 square drive bit is best but some philips will fit sufficiently to remove them. When you remove them the mirror and wood is going to come down so have some hands holding the wood frame. Underneath the wood framed mirror is the AC inlet. There is a foam sheet filter there. Since you are asking this now it is likely the foam filter has never been cleaned and is probably caked with a layer of dust. This filter cleaning is a bi-annual ritual since the air intake for the fronttwo AC units is under those two small oval mirrors. you will notice they are spaced off the ceiling to create a gap. That gap becomes the air inlet for the AC unit and the filter is under it.
Each of the four long screws goes thru a wooden round dowel section of broom handle that serves as the 1 inch spacer to create the gap for air flow to the AC inlet Those are likely to fall off the screws and/or off the wooden mirror surround if you completely remove the screw. Don't completely remove the screw. It is about 3 inches long if i remember correctly so you can loosen it until it sticks out quite a bit and the threads will stay in the wooden dowel spacer to hold it in place when you lower the mirror surround. You will feel when the last thread aactually holding the surround lets go of the support it engages so stop then. They are a PIA to put back together which is why you want to mark the front end of the surround and keep the screws and spacers together. The 4 holes are not symmetrical as you would expect. They are as random as the Entegra employee made them when they assembled this....probably upside down or something.
Good luck with it. Not too difficult if you are tall but a PIA and very frustrating to get all 4 screws lined back up in their respective holes.
Post results for our amusement