Cockroach Feces Picture How Do You Remove Cockroach Feces Off The Walls?

How do you remove cockroach feces off the walls? - cockroach feces picture

ok I'll admit that mistakes in my house, and they are all the more so because I have many .. Crude acrylic panitings chew like it .. Nevertheless, I have the pictures and things, and Roach droppings behind them, and I do not know how to get down. I have tried as best I can wash, but some are still available.

Proposals for the rudeness?