How do I get rid of the fine black powder resideu from the toilettank?

The Works or Bleach, but don't mix them!





The Works, is a great product, but be careful, when I used it in my toilet, you could see what looked like smoke when it was eating through all the dirt and grime the two men who lived here before we moved in accumulated.How do I get rid of the fine black powder resideu from the toilettank?
get a bottle of a product called --the works--ugruHow do I get rid of the fine black powder resideu from the toilettank?
Stop eating gunpowder.
bleach!