Depending on stage of life, RAs can be very small. You will not see them with the naked eye. I use magnifying goggles and a bright LED flashlight to see them. You can use a loupe if you don't have the goggles. You sometimes have to stare at on spot for a minute or two before you will see one move. They are tricky little bastards, but if they are there, you will see them with magnification and patience.
I am hoping that it was adding the extra light. It did get pretty hot in there, and it is double the light I had before. Where did you get your goggles? I want to be sure, as I did open a new bag of Coco around the same time. Never had a problem like this before...but I will figure it out.