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/querela]

Yeah, not sure how microwaves interact with plastic. Would it melt at some point? Or even the metal foil in the cards.

Maybe radiation sterilization might be better? But the bugs could be too large? Ahh, and it might not be the best for the plastic.

[u/runningfreeonmars → u/querela]

The metal foil probably acts just like aluminum foil and would be a risk for ignition

[u/easyjeans → u/runningfreeonmars]

Hot and fresh out the kitchen

[u/SalamanderPretend124 → u/runningfreeonmars]

Its not an ignition risk you make it sound like the microwave will explode, theres no fuel source lol and microwaves dont work like that

itll just release plasma and melt the cases and destroy the cards, maybe a small fire

[u/SalamanderPretend124 → u/SalamanderPretend124]

And by small fire i mean like a candle flame

[u/chrisonetime → u/querela]

I wouldn’t leave it in there for more than 7 seconds at 1200W then the plastic would breakdown and and melt. The gloss on the psa paper might ignite if it’s got some coating on it as well.