[AdamJoshua]

Just curious did you wipe or vacuum out the humi before setting it up to season, could it be some kind of light dust or something in the box that when the lid gets closed "dropped" that some kind of debris falls and you only see it in the water not the bottom of the box?

Oh and you might want to look into beads over the boli paks, much more versatile as far as setting the RH you want, they last basically forever, no need to replace them every couple of months and several other reasons, you can find the link to them on CigarNut's sig line.