white mold is something that will happen. This is normal. It is caused from the heat and humidity. If you get some springtails, they will help with it as they eat mold. I get mold every now and again with my setup, and it goes away. If I find it is a lot that is forming, I just clean it.

When there is black mold, then it would be something to be really concerned about, but you are fine with just white mold