Solved: Bought 350ml refill cart set and inks - Why only two syringes?

Is it because I am only sucking in ink from the cartridge?
I can easily wipe the outside of the tube but will any in the tube contaminate the ink in the cartridge?
Do I need to clean it completely between cartridges?

Kent, you should have received 2 packages of four of these syringes with priming tips. If you did not Yes, the syringes are only for priming. You should have received the new priming tips for removing air from the carts. If you pull up some ink. Just rinse it in the sink and then shoot some of the water out of the priming tip to clear it.