Stain on white jeans?

I have this annoying pen stain on my white jeans. its not big.
I can't appear to get it out. I merely used Spray N wash next to resolve power... I don't see it working though. Do you know anything that will work!!
thank u
How do I catch rid of the smell...
Answers:    Back in the morning I used to use regular colgate toothpaste..just dabber a drop on the spot and rub it surrounded by and then wipe up it like usual washing..It take out the stain and look MA!-No ring stains!
How to bring back ever lazyness?
use Aqua Net aerosol hair spray. Spray it on the stain and wipe. It also works on marker. Discovered this when I get black marker and ink on something