Instruct: Classify Amazon reviews into positive or negative sentiment
Query: What's the tab for??

I may change this later, but I received the ink cartridges and I noticed a pull tab on them with some sort of cryptic icon about what to do. No instructions. No directions. Nothing. My OEM cartridges do not have this tab so I have no clue what its for or whether or not its supposed to be pulled off or not. I pulled one off, which squirted ink onto me and left what appears to be a gaping hole. Is it supposed to be there? Some sort of instructions would have been nice.