Well its not really bad. I just thought any mold was bad. Its only on one end of one and in small patches on the other. I wish I could get springtails in my area but I've never seen them. I clean the decor in hot water every week or two so I guess if its not a major problem then I'll just keep doing that. I'll keep an eye on it, though, and if it gets worse or Azy seems to be getting into it (at the moments its not growing where she likes to sit) I'll toss the wood.

Thanks for the help. ^w^