Eh, ... , no bloom is usually white and powdery.
You could try spraying the inside of your shoes with Lysol to kill whatever is growing in there. If you're wiping the slime off of the outside of the shoe, maybe it's something you brushed up against with your shoe?? I don't know that it is coming from inside the shoe.
Did you wear it in lots of rain and then store it in a locker of some sort where mold could grow??
The last time I wore them was about 2 months ago and no rain on that day.
I put them in the closet together with other shoes. Only this pair has mold on. (thank god....)
This time I might just put them under sunlight for a few days and hope it could kill the mold......