stupid is as stupid does

I just finished installing a new ink cartridge in my printer, something I've done dozens of times. Prior to the install I removed the piece of tape on the cartridge, swapped out the old cartridge and did a test print. Nothing printed. I tried printing something else. Still nothing. Took out the cartridge and put in in again. Still nothing. 10 more minutes of this I took out the cartridge and discovered that there was a second piece of tape. There's a period of time that I lost and will never get back..