My printer was jamming like crazy. 3/4 jobs would jam and then finally it wouldn't print at all. I ordered a new printer from a good black friday sale at B&H (Canon MG6320). As I was hauling out the old one I popped the lid and noticed one of the rollers was higher than the others. I noticed a small plastic corner of something stuck under it. Pulling out the flashlight and prying at it with a butter knife revealed the answer to where that memory card I had lost went. 
Memory card saved, but I tried the printer after removing the card and it must have been damaged permanently. Oh well, these printers are cheaper than ink anyway. 
