Strange picture files keep showing up in my gallery

[ibikeiruniswim]

I keep having these strange jpegs showing up in my gallery. I delete them but they keep coming back. In the gallery they are usually all in a file called "cache" but when I was looking for the files from my computer I could only find them in the thumbnails folder. Any ideas, it's getting annoying?

 

[jack22182]

These are coming from that battery status/measurement app - darn if I can remember the name right now.

 

[ibikeiruniswim]

Ah you go it. It's coming from juiceplotter which I'm going to uninstall since I never use it anyway.