REALLY flex your noodle

I am an action that cleanses & protects. My last four letters identify one unit of a connected series. My last three letters are often seen on paper. What am I?

all i can think of is BLINK

Blinking (cleans and protects your eye)
LINK (connected series)
INK (seen on paper)

WTG MissBeeHaven, your good at these!!!!

Blink?

That was my guess, and then I checked the other answers.

Nice work Miss.