Vellfire misty lights

Decided to tackle the annoying misty lights on the vellfire.

Starting with the rear side units, the top of the unit is easy to sort, remove the indicator bulb then blow warm air in, the bottom half though appears to be a sealed led unit, I can't see a vent/drain and no way to open it up. I have been warming the outside which is working (slowly) to evaporate the moisture inside but this seems like it's going to come back unless there is somewhere for it to go....anyone sorted out similar?

For the fronts, I'm assuming I can pull a cover off the back and let them air out?Mercs suffer the same issue and removal of the cover for a few days and some warm air usually sorts them....same here?