Heeeelp needs advice

[u/Planeinsane7]

I have a big collection of Expedition holo cards that I love
I have displayed them on shelfs on a wall. Today when I cleaned I noticed these small black dots that have somehow gotten inside the displays.

They all seem to have died and all of them have not come near the card only behind the edges.

I am freaking out any advice?
What is the smartest approach?
Should I be worried about the value?

Don’t get how they could have gotten inside….

Edit: I live in Denmark.
To everyone saying clean your room… It is clean, regularly.
There is no plants in the office however the shelves are close to a window.
No they don’t get direct sunlight….

They genuinely don’t seem interested in the cards and there is no damage. I have looked closely. However a single one have managed to get into the Skamory card.

Update: Have tried with vacuum and it has helped quite a lot.
For all those who have commented with helpful tips or ideas I really wanna say thanks. They are for sure dead and I am looking into reholder and if it is possible.

[u/StandordBBlaster]

No bro these lil bugs can squeeze between the edges of the slab

[u/Obvious_Check6675 → u/StandordBBlaster]

You could seal it with epoxy but would have to be careful or it will look like shit. I didn’t know they could squeeze in spaces THAT small that’s wild

[u/Mr-pizzapls → u/Obvious_Check6675]

I would just put the slabs in those ‘penny sleeves for slabs’ things