Getting in there is a royal PITA.
Plenty of guides how, on this and the other fora, as well as some aux videos on youtube and a good breakdown in the service manual.
Do not attempt to get in there via the foam (you will ruin or unseat it). And frankly, maybe best NOT to have the SC or mobile service mess with it either... there are a dozen+ things they can brake in the process that are far more annoying to deal with it.
Eventually, as the months rack up, you may have enough dust and debris build up in there that it will be worth going through the headache of taking the rear pillars and shelf apart to get at it.
Odd sticker nonetheless.
The more common problems are:
water stains (within spec)
dust, debris (within spec)
3rd break light flooding onto the rear windshield (when the foam is damaged or mis-installed or missing)