So as I mentioned in my last post, I threw the wafer outside because I thought it was smelly. The wafer turned out not to be the source of the smell anyway, so that was a waste.
Moving it made the wafer break up and sink a bit. The red stopped growing and turning deeper in colour, and black spots grew on top of the red. Then it got rained on, which disturbed it more.
Then I forgot about it for a while.
Now I have another wafer with small red spots dried to the inside of a jar. This one also has a dead bug.
I don’t see much point in keeping this one so I’m probably going to toss it in the dishwasher.