I think there are some. After a few hours it starting to show errors when I verified it but it’s going to take ages. I’m looking for a eprom eraser from eBay but it will take a long time to order also.. I got some extra chips on their way from China so I can flash it onto new ones if I don’t manage to erase this one first.
We don’t have long days here in Norway in the winter so it’s limited time with sun. I might take my first solarium ever tomorrow just to erase this chip lol
edit, I’ve just read that welding arcs has a lot of UVC in them. Can I clear it by having it close to me just welding some to give UVC light for the chip?