Cleaning an old AC hybrid nest V2 with mold

[Firecatto21]

In 2017 I received my (old) AC hybrid nest V2 and I gave it to my lasius colony. Till the september next year (2018). Something went wrong with the colony and I removed them from the nest and died. Now I have another colony for the nest and I decided to clean the nest. When cleaning the nest I noticed a lot of mold in the part between the ants and the cotton. I have tried scrubbing hard and nothing has come off and now even worse the thing has started to peel off.

Here are some photos of the nest

https://drive.google.com/file/d/169MkaumSCqrFXpi2K2lLtNmLrfDjvkOH/view?usp=drivesdk

[antnest8]

are those dead ants?

[Firecatto21]

No...?

[Lorcan]

I'm having the same problem