u/Capital_Big_8536

I just moved into a new apartment that came with an existing AC Unit to go in the window. I am unfortunately now realizing the entire inside is covered in gunk, very worried that this is mold. Would I be correct in my concerns?

Just moved into a new apartment that came with an existing AC Unit. There’s a bunch of gunk in the vent that blows cool air into the room, worried it’s mold. Am I correct in my concerns?