I received the 6A00 Error Code that i saw everyone talking about, tried to open it up and clean it out like everyone said; found the white slide tab (i think) and got that moving, y97nw5t but ya'll must all have much smaller hands than i do. I couldn't really see in there or tell what was what. Found a small flat piece of something about an inch long and quarter inch wide loose in there? Not sure what it is or where it should go. Any ideas? Also, is there an easy way to remove the cover so i can see better into the printer? Human Cortisol ELISA Kit Now when i close it and turn it on, i keep getting the 5100 error code.