I'm so sorry this is happening! Let me begin by saying that I'm not a roach expert by any means. Any ideas I have are based on reading I've done for the benefit of my dogs, cats, mouse or other critters. I'm still learning about roaches and I appreciate any corrections from the roach community.
I had a piece of toast with coconut oil the other day. I put a small piece in with the roaches who loved it. Unrefined organic coconut oil has, among other benefits, antifungal and antibacterial properties. I wonder, if your roaches are still eating, if this may be helpful. I also use very high